# Your Ultimate Guide to Infinite Flight Fuel Burn

Sometime in early 2021, I decided to start my most ambitious Infinite Flight related project to date. I was going to find a fuel burn profile for every airliner in the game, so that people could minimize the fuel they used as well as not accidentally pack too little and have to divert.

August came and went, and my subscription expired and I chose not to renew it. I didn’t finish the project. Over this summer, I decided to come back to it due to the semi-frequent “fuel burn” topic. Yes, I bought a month subscription and spent \$10 to do less than an hour of flying on live servers just so I could finish this. I really hope this helps at least one person.

Follow-Up Post

# Fuel Calculator

In my previous fuel burn topics, I provided fuel burns with respect to load and altitude. This time, I have added a calculator too. Instructions will be in the follow-up post.

# Disclaimers

I don’t have enough characters to write a full list but basically I’m not perfect, my numbers aren’t perfect, and I assume no responsibility for violations (but let me know if something is wrong).

# Aircraft Included

This guide is mostly for airliners, so military aircraft as well as select general aviation and specialized aircraft are not included. I simply don’t have the expertise to even begin to measure fuel burn for these aircraft because there are so many variables that I don’t know. However, I suspect that the vast majority of you aren’t long hauling these aircraft anyways so this shouldn’t be a problem.

# Airbus

Fuel Capacity: 38,360 lbs or 17,400 kgs

Tested Speed: M 0.78

Game-Estimated Maximum Flight Time: 7hr 49m

Theoretical Maximum Flight Time: 9hr 24m

Flight Profile (East): FL310 (100%-71%), FL330 (70%-41%), FL350 (40%-21%), FL370 (20%-0%)

Flight Profile (West): FL320 (100%-61%), FL340 (60%-41%), FL360 (40%-21%), FL380 (20%-0%)

List of Aircraft

Fuel Capacity: 43,246 lbs or 19,616 kgs

Tested Speed: M 0.78

Game-Estimated Maximum Flight Time: 7hr 56m

Theoretical Maximum Flight Time: 10hr 13m

Flight Profile (East): FL310 (100%-91%), FL330 (90%-71%), FL350 (70%-51%), FL370 (50%-21%), FL390 (20%-0%)

Flight Profile (West): FL320 (100%-81%), FL340 (80%-61%), FL360 (60%-41%), FL380 (40%-0%)

List of Aircraft

Fuel Capacity: 43,246 lbs or 19,616 kgs

Tested Speed: M 0.78

Game-Estimated Maximum Flight Time: 8hr 01m

Theoretical Maximum Flight Time: 10hr 35m

Flight Profile (East): FL310 (100%-71%), FL330 (70%-61%), FL350 (60%-41%), FL370 (40%-0%)

Flight Profile (West): FL300 (100%-81%), FL320 (80%-61%), FL340 (60%-51%), FL360 (50%-31%), FL380 (30%-0%)

List of Aircraft

Fuel Capacity: 43,246 lbs or 19,616 kgs

Tested Speed: M 0.78

Game-Estimated Maximum Flight Time: 7hr 44m

Theoretical Maximum Flight Time: 10hr 20m

Flight Profile (East): FL310 (100%-81%), FL330 (80%-71%), FL350 (70%-51%), FL370 (50%-31%), FL390 (30%-11%), FL410 (10%-0%)

Flight Profile (West): FL320 (100%-81%), FL340 (80%-61%), FL360 (60%-41%), FL380 (40%-21%), FL400 (20%-0%)

List of Aircraft

Fuel Capacity: 55,609 lbs or 25,224 kgs

Tested Speed: M 0.80

Game-Estimated Maximum Flight Time: 9hr 46m

Theoretical Maximum Flight Time: 13hr 50m

Flight Profile (East): FL290 (100%-0%)

Flight Profile (West): FL280 (100%-0%)

Additional Comments: The A321 has a bit of a broken fuel curve in which it doesn’t exactly matter what altitude you fly at. As long as you aren’t being egregious (like FL400 at 100% load), you will probably be well within margin of error. It also seems to be more efficient at M 0.80 when heavier and 0.78 when lighter.

List of Aircraft

Fuel Capacity: 188,275 lbs or 85,400 kgs

Tested Speed: M 0.82

Game-Estimated Maximum Flight Time: 18hr 33m

Theoretical Maximum Flight Time: 21hr 01m

Flight Profile (East): FL310 (100%-81%), FL330 (80%-71%), FL350 (70%-51%), FL370 (50%-41%), FL390 (40%-31%), FL410 (30%-11%), FL430 (10%-0%)

Flight Profile (West): FL300 (100%-91%), FL320 (90%-71%), FL340 (70%-61%), FL360 (60%-41%), FL380 (40%-31%), FL400 (30%-21%), FL420 (20%-0%)

List of Aircraft

Fuel Capacity: 240,710 lbs or 109,184 kgs

Tested Speed: M 0.82

Game-Estimated Maximum Flight Time: 23hr 44m

Theoretical Maximum Flight Time: 23hr 55m

Flight Profile (East): FL310 (100%-81%), FL330 (80%-61%), FL350 (60%-41%), FL370 (40%-21%), FL390 (20%-11%), FL410 (10%-0%)

Flight Profile (West): FL280 (100%-91%), FL300 (90%-81%), FL320 (80%-71%), FL340 (70%-51%), FL360 (50%-31%), FL380 (30%-21%), FL400 (20%-0%)

List of Aircraft

Fuel Capacity: 245,313 lbs or 111,272 kgs

Tested Speed: M 0.82

Game-Estimated Maximum Flight Time: 24hr 11m

Theoretical Maximum Flight Time: 24hr 36m

Flight Profile (East): FL290 (100%-81%), FL310 (80%-71%), FL330 (70%-61%), FL350 (60%-41%), FL370 (40%-31%), FL390 (30%-11%), FL410 (10%-0%)

Flight Profile (West): FL280 (100%-91%), FL300 (90%-81%), FL320 (80%-61%), FL340 (60%-51%), FL360 (50%-31%), FL380 (30%-21%), FL400 (20%-0%)

Additional Comments: Interesting to note that the A339 presents little fuel efficiency advantage over the A333 (the 40 extra minutes of flight time comes from the added fuel capacity). The only benefit is a slightly higher load capacity, which means a lower load percentage with the same non-fuel weight which means slightly less burn with heavy non-fuel loads.

List of Aircraft

Fuel Capacity: 375,932 lbs or 170,520 kgs

Tested Speed: M 0.82

Game-Estimated Maximum Flight Time: 17hr 21m

Theoretical Maximum Flight Time: 18hr 16m

Flight Profile (East): FL290 (100%-31%), FL310 (30%-0%)

Flight Profile (West): FL280 (100%-41%), FL300 (40%-21%), FL320 (20%-0%)

Additional Comments: Slight fuel advantage going west but not enough for me to make two different regressions for the calculator.

List of Aircraft

Fuel Capacity: 285,499 lbs or 129,500 kgs

Tested Speed: M 0.85

Game-Estimated Maximum Flight Time: 22hr 19m

Theoretical Maximum Flight Time: 25hr 40m

Flight Profile (East): FL290 (100%-51%), FL310 (50%-0%)

Flight Profile (West): FL280 (100%-31%), FL320 (30%-0%)

Additional Comments: I know most of you won’t want to fly your A350 this way so if you follow a more normal curve starting around FL330 and going up to FL410 and climbing linearly, plan to add about 500 pounds of additional fuel per flight hour.

List of Aircraft

Fuel Capacity: 559,937 lbs or 253,983 kgs

Tested Speed: M 0.85

Game-Estimated Maximum Flight Time: 22hr 11m

Theoretical Maximum Flight Time: 22hr 13m

Flight Profile (East): FL350 (100%-91%), FL370 (90%-71%), FL390 (70%-41%), FL410 (40%-11%), FL430 (10%-0%)

Flight Profile (West): FL360 (100%-81%), FL380 (80%-51%), FL400 (50%-21%), FL420 (20%-0%)

Additional Comments: Flight profiles may result in over 100% N1. If you would like to avoid this, just follow a profile to be as close to 100% N1 as possible as this seems to be where the aircraft is efficient.

List of Aircraft

# Boeing

Fuel Capacity: 29,498 lbs or 13,380 kgs

Tested Speed: M 0.77

Game-Estimated Maximum Flight Time: 3hr 43m

Theoretical Maximum Flight Time: 5hr 30m

Flight Profile (East): FL290 (100%-0%)

Flight Profile (West): FL280 (100%-0%)

List of Aircraft

Fuel Capacity: 73,811 lbs or 33,480 kgs (83,401 lbs or 37,830 kgs overloaded)

Tested Speed: M 0.78

Game-Estimated Maximum Flight Time: 13hr 27m (15hr 13m overloaded)

Theoretical Maximum Flight Time: 19hr 10m (~20hr 30m overloaded)

Flight Profile (East): FL310 (100%-61%), FL330 (60%-41%), FL350 (40%-21%), FL370 (20%-11%), FL390 (10%-0%)

Flight Profile (West): FL300 (100%-71%), FL320 (70%-61%), FL340 (60%-41%), FL360 (40%-21%), FL380 (20%-11%), FL400 (10%-0%)

Additional Comments: This is the only aircraft in this guide that can go over MTOW in just fuel. If you are attempting a maximum flight time run, this 13% extra load in fuel will get you about 80 minutes in flight time.

List of Aircraft

Fuel Capacity: 46,068 lbs or 20,896 kgs

Tested Speed: M 0.78

Game-Estimated Maximum Flight Time: 8hr 24m

Theoretical Maximum Flight Time: 12hr 58m

Flight Profile (East): FL310 (100%-61%), FL330 (60%-41%), FL350 (40%-21%), FL370 (20%-11%), FL390 (10%-0%)

Flight Profile (West): FL300 (100%-71%), FL320 (70%-61%), FL340 (60%-41%), FL360 (40%-21%), FL380 (20%-11%), FL400 (10%-0%)

List of Aircraft

Fuel Capacity: 46,068 lbs or 20,896 kgs

Tested Speed: M 0.78

Game-Estimated Maximum Flight Time: 8hr 24m

Theoretical Maximum Flight Time: 12hr 57m

Flight Profile (East): FL290 (100%-81%), FL310 (80%-61%), FL330 (60%-51%), FL350 (50%-21%), FL370 (20%-0%)

Flight Profile (West): FL280 (100%-91%), FL300 (90%-61%), FL320 (60%-51%), FL340 (50%-31%), FL360 (30%-21%), FL380 (20%-0%)

Additional Comments: Slightly different flight profiles than the 737-800 but the flight times and fuel burns are almost identical.

List of Aircraft

Fuel Capacity: 354,252 lbs or 160,686 kgs

Tested Speed: M 0.85

Game-Estimated Maximum Flight Time: 18hr 45m

Theoretical Maximum Flight Time: 19hr 56m

Flight Profile (East): FL290 (100%-91%), FL310 (90%-51%), FL330 (50%-41%), FL350 (40%-31%), FL370 (30%-11%), FL390 (10%-0%)

Flight Profile (West): FL300 (100%-61%), FL320 (60%-41%), FL340 (40%-31%), FL360 (30%-21%), FL380 (20%-11%), FL400 (10%-0%)

List of Aircraft

Fuel Capacity: 354,459 lbs or 160,780 kgs

Tested Speed: M 0.85

Game-Estimated Maximum Flight Time: 18hr 46m

Theoretical Maximum Flight Time: 18hr 07m

Flight Profile (East): FL290 (100%-0%)

Flight Profile (West): FL280 (100%-31%), FL300 (30%-0%)

Additional Comments: Using Flaps 10 saves a massive amount of fuel in a pinch.

List of Aircraft

Fuel Capacity: 433,936 lbs or 196,830 kgs

Tested Speed: M 0.85

Game-Estimated Maximum Flight Time: 23hr 44m

Theoretical Maximum Flight Time (East): 20hr 50m

Theoretical Maximum Flight Time (West): 21hr 19m

Flight Profile (East): FL290 (100%-71%), FL310 (70%-41%), FL330 (40%-21%), FL350 (20%-0%)

Flight Profile (West): FL280 (100%-0%)

Additional Comments: This is the only aircraft in this guide that had such a big east/west discrepancy that I decided to do one calculator for each (for comparison, most other aircraft are within 5 minutes between their east and west profiles). It is likely that FL270 has the same effect as FL280, but that is below the Mach Transition so I chose not to include it.

List of Aircraft

Fuel Capacity: 76,968 lbs or 34,912 kgs

Tested Speed: M 0.80

Game-Estimated Maximum Flight Time: 10hr 17m

Theoretical Maximum Flight Time: 11hr 38m

Flight Profile (East): FL310 (100%-41%), FL390 (40%-21%), FL410 (20%-0%)

Flight Profile (West): FL300 (100%-71%), FL320 (70%-41%), FL400 (40%-0%)

List of Aircraft

Fuel Capacity: 176,370 lbs or 80,000 kgs

Tested Speed: M 0.82

Game-Estimated Maximum Flight Time: 18hr 51m

Theoretical Maximum Flight Time: 28hr 48m

Flight Profile (East): FL290 (100%-81%), FL310 (80%-61%), FL330 (60%-51%), FL370 (50%-31%), FL390 (30%-11%), FL410 (10%-0%)

Flight Profile (West): FL280 (100%-71%), FL300 (70%-61%), FL320 (60%-51%), FL360 (50%-41%), FL380 (40%-21%), FL400 (20%-0%)

List of Aircraft

Fuel Capacity: 307,492 lbs or 139,476 kgs

Tested Speed: M 0.84

Game-Estimated Maximum Flight Time: 20hr 55m

Theoretical Maximum Flight Time: 27hr 58m

Flight Profile (East): FL290 (100%-71%), FL310 (70%-51%), FL330 (50%-31%), FL350 (30%-21%), FL370 (20%-0%)

Flight Profile (West): FL300 (100%-51%), FL320 (50%-31%), FL360 (30%-11%), FL380 (10%-0%)

List of Aircraft

Fuel Capacity: 325,349 lbs or 147,576 kgs

Tested Speed: M 0.84

Game-Estimated Maximum Flight Time: 22hr 07m

Theoretical Maximum Flight Time: 33hr 26m

Flight Profile (East): FL290 (100%-31%), FL370 (30%-0%)

Flight Profile (West): FL280 (100%-71%), FL300 (70%-51%), FL320 (50%-41%), FL360 (40%-21%), FL380 (20%-0%)

Additional Comments: Barring any exploits, this is the longest range aircraft in the game by a decent margin. Middle altitudes work too as long as you’re reasonable.

List of Aircraft

Fuel Capacity: 307,492 lbs or 139,476 kgs

Tested Speed: M 0.84

Game-Estimated Maximum Flight Time: 19hr 42m

Theoretical Maximum Flight Time: 26hr 14m

Flight Profile (East): FL290 (100%-91%), FL310 (90%-61%), FL330 (60%-41%), FL370 (40%-0%)

Flight Profile (West): FL300 (100%-51%), FL320 (50%-41%), FL360 (40%-21%), FL380 (20%-0%)

List of Aircraft

Fuel Capacity: 319,670 lbs or 145,000 kgs

Tested Speed: M 0.84

Game-Estimated Maximum Flight Time: 21hr 44m

Theoretical Maximum Flight Time: 31hr 27m

Flight Profile (East): FL290 (100%-61%), FL310 (60%-21%), FL370 (20%-0%)

Flight Profile (West): FL280 (100%-71%), FL300 (70%-51%), FL320 (50%-31%), FL360 (30%-11%), FL380 (10%-0%)

List of Aircraft

Fuel Capacity: 223,377 lbs or 101,322 kgs

Tested Speed: M 0.85

Game-Estimated Maximum Flight Time: 21hr 08m

Theoretical Maximum Flight Time: 23hr 17m

Flight Profile (East): FL310 (100%-71%), FL330 (70%-51%), FL350 (50%-11%), FL370 (10%-0%)

Flight Profile (West): FL320 (100%-61%), FL340 (60%-31%), FL360 (30%-11%), FL380 (10%-0%)

List of Aircraft

Fuel Capacity: 223,377 lbs or 101,322 kgs

Tested Speed: M 0.85

Game-Estimated Maximum Flight Time: 19hr 30m

Theoretical Maximum Flight Time: 21hr 33m

Flight Profile (East): FL310 (100%-71%), FL330 (70%-51%), FL350 (50%-0%)

Flight Profile (West): FL300 (100%-71%), FL340 (70%-31%), FL360 (30%-21%), FL380 (20%-0%)

List of Aircraft

Fuel Capacity: 223,377 lbs or 101,322 kgs

Tested Speed: M 0.85

Game-Estimated Maximum Flight Time: 19hr 30m

Theoretical Maximum Flight Time: 21hr 32m

Flight Profile (East): FL310 (100%-81%), FL330 (80%-51%), FL350 (50%-0%)

Flight Profile (West): FL320 (100%-61%), FL340 (60%-31%), FL360 (30%-0%)

Additional Comments: Different profiles than the 787-9, but similar burn and almost identical flight time.

List of Aircraft

# Bombardier

Fuel Capacity: 16,508 lbs or 7,488 kgs

Tested Speed: M 0.74

Game-Estimated Maximum Flight Time: 6hr 47m

Theoretical Maximum Flight Time: 8hr 08m

Flight Profile (East): FL290 (100%-0%)

Flight Profile (West): FL280 (100%-0%)

List of Aircraft

Fuel Capacity: 19,597 lbs or 8,889 kgs

Tested Speed: M 0.78

Game-Estimated Maximum Flight Time: 4hr 27m

Theoretical Maximum Flight Time: 6hr 25m

Flight Profile (East): FL290 (100%-81%), FL310 (80%-31%), FL350 (30%-0%)

Flight Profile (West): FL300 (100%-61%), FL320 (60%-41%), FL340 (40%-0%)

List of Aircraft

Fuel Capacity: 19,597 lbs or 8,889 kgs

Tested Speed: M 0.78

Game-Estimated Maximum Flight Time: 4hr 27m

Theoretical Maximum Flight Time: 6hr 36m

Flight Profile (East): FL310 (100%-21%), FL330 (20%-0%)

Flight Profile (West): FL300 (100%-41%), FL320 (40%-21%), FL340 (20%-0%)

List of Aircraft

Fuel Capacity: 19,597 lbs or 8,889 kgs

Tested Speed: M 0.78

Game-Estimated Maximum Flight Time: 5hr 26m

Theoretical Maximum Flight Time: 7hr 33m

Flight Profile (East): FL290 (100%-91%), FL310 (90%-51%), FL330 (50%-21%), FL370 (20%-0%)

Flight Profile (West): FL300 (100%-61%), FL320 (60%-51%), FL340 (50%-0%)

List of Aircraft

Fuel Capacity: 11,812 lbs or 5,358 kgs

Tested Speed: M 0.59 (240 knots at FL240 and 235 knots at FL250)

Game-Estimated Maximum Flight Time: 4hr 25m

Theoretical Maximum Flight Time: 7hr 19m

Flight Profile (East): FL250 (100%-0%)

Flight Profile (West): FL240 (100%-0%)

Additional Comments: This technically is always below Mach Transition, but I chose to include it anyways because it’s pretty predictable.

List of Aircraft

# Cessna

Fuel Capacity: 12,919 lbs or 5,860 kgs

Tested Speed: M 0.82

Game-Estimated Maximum Flight Time: 11hr 05m

Theoretical Maximum Flight Time: 15hr 03m

Flight Profile (East): FL290 (100%-0%)

Flight Profile (West): FL280 (100%-0%)

Additional Comments: Pretty strange numbers, there’s not really a pattern and it’s sort of all over the place so you mostly can just do what you want.

List of Aircraft

# Embraer

Fuel Capacity: 18,140 lbs or 8,228 kgs

Tested Speed: M 0.75

Game-Estimated Maximum Flight Time: 3hr 51m

Theoretical Maximum Flight Time: 4hr 05m

Flight Profile (East): FL330 (100%-71%), FL350 (70%-51%), FL370 (50%-11%), FL390 (10%-0%)

Flight Profile (West): FL320 (100%-71%), FL340 (70%-51%), FL380 (50%-0%)

List of Aircraft

Fuel Capacity: 28,660 lbs or 13,000 kgs

Tested Speed: M 0.75

Game-Estimated Maximum Flight Time: 6hr 06m

Theoretical Maximum Flight Time: 8hr 04m

Flight Profile (East): FL310 (100%-91%), FL330 (90%-51%), FL350 (50%-0%)

Flight Profile (West): FL300 (100%-81%), FL320 (80%-71%), FL340 (70%-11%), FL360 (10%-0%)

List of Aircraft

Fuel Capacity: 28,660 lbs or 13,000 kgs

Tested Speed: M 0.75

Game-Estimated Maximum Flight Time: 6hr 06m

Theoretical Maximum Flight Time: 7hr 50m

Flight Profile (East): FL310 (100%-71%), FL330 (70%-51%), FL350 (50%-0%)

Flight Profile (West): FL320 (100%-51%), FL340 (50%-21%), FL360 (20%-0%)

List of Aircraft

# McDonnell Douglas

Fuel Capacity: 230,017 lbs or 104,334 kgs

Tested Speed: M 0.83

Game-Estimated Maximum Flight Time: 18hr 34m

Theoretical Maximum Flight Time: 21hr 17m

Flight Profile (East): FL310 (100%-91%), FL330 (90%-71%), FL350 (70%-41%), FL390 (40%-31%), FL410 (30%-0%)

Flight Profile (West): FL320 (100%-81%), FL340 (80%-61%), FL360 (60%-51%), FL380

List of Aircraft

Fuel Capacity: 230,017 lbs or 104,334 kgs

Tested Speed: M 0.83

Game-Estimated Maximum Flight Time: 18hr 34m

Theoretical Maximum Flight Time: 21hr 13m

Flight Profile (East): FL310 (100%-81%), FL330 (80%-71%), FL350 (70%-51%), FL370 (50%-41%), FL390 (40%-21%), FL410 (20%-0%)

Flight Profile (West): FL300 (100%-91%), FL320 (90%-81%), FL340 (80%-61%), FL360 (60%-41%), FL380 (40%-31%), FL400 (30%-0%)

Additional Comments: I was expecting this to have the exact same numbers as its passenger counterpart, but it doesn’t. Regardless, they have similar flight times.

List of Aircraft

Fuel Capacity: 230,017 lbs or 104,334 kgs

Tested Speed: M 0.83

Game-Estimated Maximum Flight Time: 12hr 31m

Theoretical Maximum Flight Time: 30hr 03m

Flight Profile (East): FL350 (100%-81%), FL370 (80%-51%), FL390 (50%-41%), FL410 (40%-21%), FL430 (20%-0%)

Flight Profile (West): FL340 (100%-91%), FL360 (90%-61%), FL380 (60%-41%), FL400 (40%-31%), FL420 (30%-0%)

Additional Comments: This has got to be the most ridiculous fuel curve in the game. Everything is fine until you get to the lower weights. Then, the MD-11 enters this pocket where around 70% (ish) throttle it experiences a significant drop in fuel usage. This leads to some pretty insane numbers (as well as points where decreasing the weight actually increases fuel usage because it leaves the pocket). The safety margin on reserve fuel here is 1.5x the 50% 1-hour burn instead of 1x just in case the extra weight causes you to not get into the pocket.

List of Aircraft

Fuel Capacity: 230,017 lbs or 104,334 kgs

Tested Speed: M 0.83

Game-Estimated Maximum Flight Time: 12hr 31m

Theoretical Maximum Flight Time: 19hr 25m

Flight Profile (East): FL350 (100%-81%), FL370 (70%-51%), FL390 (50%-31%), FL410 (30%-21%), FL430 (20%-0%)

Flight Profile (West): FL340 (100%-81%), FL360 (80%-61%), FL380 (60%-41%), FL400 (40%-31%), FL420 (30%-0%)

Additional Comments: Like the DC-10, I was expecting this to have the same numbers as its passenger counterpart. However, this is not the case. It doesn’t go into the same pocket that the passenger version does, which leads to it having a more normal fuel curve (albeit it burns quite a bit more than the passenger version even when its out of the pocket).

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# Aircraft Rankings and Discussion

These are to give you an idea of how the different aircraft in this game compare to each other.

# Longest Flight Times

Straight comparison of maximum theoretical flight time.

1. 777-200(LR) 2. 777-200(F) 3. MD-11 4. 767-300 5. 777-200(ER)
6. 777-300(ER) 7. A350-900 8. A330-900 9. A330-300 10. 787-8
11. A380-800 12. 787-9 13. 787-10 14. 747-8 (W) 15. DC-10
16. DC-10(F) 17. A330-200(F) 18. 747-8 (E) 19. 737-700 (113%) 20. 747-200
21. MD-11(F) 22. 737-700 (100%) 23. A340-600 24. 747-400 25. Citation X
26. A321-200 27. 737-800 28. 737-900 29. 757-200 30. A319-100
31. A320-200 32. A318-100 33. A220-300 34. CRJ-200 35. ERJ-190
36. ERJ-195 37. CRJ-1000 38. Dash 8 Q400 39. CRJ-900 40. CRJ-700
41. 717-200 42. ERJ-170 43. ERJ-175

You see some unsurprising aircraft near the top, but the two that are most surprising are the MD-11 and the 767-300, both capable of flying for around 30 hours. On the MD-11, this is due to the “pocket” that it goes into, but the 767-300 just burns way less fuel all around than you would expect. The 737-700 sits way higher than you would think, but it makes sense given that it’s based off the BBJ with auxiliary tanks.

# Longest Range

Flight time multiplied by speed.

1. 777-200(LR) 2. 777-200(F) 3. MD-11 4. 767-300 5. 777-200(ER)
6. 777-300(ER) 7. A350-900 8. A330-900 9. 787-8 10. A330-300
11. A380-800 12. 787-9 13. 787-10 14. 747-8 (W) 15. DC-10
16. DC-10(F) 17. 747-8 (E) 18. A330-200(F) 19. 747-200 20. MD-11(F)
21. 737-700 (113%) 22. 747-400 23. A340-600 24. 737-700 (100%) 25. Citation X
26. A321-200 27. 737-800 28. 737-900 29. 757-200 30. A319-100
31. A320-200 32. A318-100 33. A220-300 34. ERJ-190 35. CRJ-200
36. CRJ-1000 37. ERJ-195 38. CRJ-900 39. CRJ-700 40. Dash 8 Q400
41. 717-200 42. ERJ-170 43. ERJ-175

I know that aircraft get slower as they climb but I didn’t think it would affect enough to run those very time consuming calculations. This list looks very similar to the first one, but the 747s have a bit of a boost, the 737-700 gets toned down a bit, and the Dash 8 also takes a large hit because of how slow it is.

# Highest Efficiency

Theoretical maximum flight time divided by game-estimated maximum flight time.

1. MD-11 2. Dash 8 Q400 3. MD-11(F) 4. 737-800 5. 737-900
6. 767-300 7. 777-200(LR) 8. CRJ-900 9. 717-200 10. 777-200(F)
11. CRJ-700 12. 737-700 (100%) 13. A321-200 14. CRJ-1000 15. Citation X
16. 737-700 (113%) 17. 777-200(ER) 18. A320-200 19. 777-300(ER) 20. ERJ-190
21. A319-100 22. A318-100 23. ERJ-195 24. A220-300 25. CRJ-200
26. A350-900 27. DC-10 28. DC-10(F) 29. A330-200(F) 30. 757-200
31. 787-9 32. 787-10 33. 787-8 34. 747-200 35. ERJ-170
36. A340-600 37. ERJ-175 38. A330-900 39. A330-300 40. A380-800
41. 747-400 42. 747-8 (W) 43. 747-8 (E)

If you’ve played Infinite Flight for a while, most of this list will make sense to you. Some surprising entries on this list include the MD-11, Dash 8, and 717-200, which all can fly for way longer than the game says. I find it interesting that the DC-10 is rated for 50% more flight time than the MD-11 despite the two aircraft sharing fuel tank size, OEW (close enough) and general design. It seems that the MD-11 is severely underrated in flight time, even discounting the pocket it goes into.

# Step Climbing

One question that I wanted to make sure to answer while putting together this project was which aircraft need step climbing to be efficient. One of the loading screens says you should step climb for greater range, but how true is this?

For the purposes of this chart, I will assume that you have picked a good starting altitude. Just because an aircraft is in “Don’t Bother” doesn’t mean you can take it to FL410 at 100% load.

Practically a Law Highly Recommended Helps a Little Can If You Want Don’t Bother
A330-200(F) A220-300 A318-100 A321-200 717-200
A330-300 A319-100 A320-200 A340-600 747-400
A330-900 737-700 A380-800 A350-900 CRJ-200
767-300 737-800 757-200 747-200 Dash 8 Q400
MD-11 737-900 777-200(LR) 747-8
MD-11(F) 777-200(ER) 787-8 C750
777-200(F) 787-9
777-300(ER) 787-10
CRJ-1000 CRJ-700
DC-10 CRJ-900
DC-10(F) ERJ-170
ERJ-190 ERJ-175
ERJ-195

2. If you have Microsoft Excel on your local machine, you can download the file from here and start using it.

3. If you don’t have Microsoft Excel, you’ll need a Google Account.

4. Hit “file” in the top left corner, and then “make a copy”.

5. Follow the prompts until you have a non-read-only version in your Drive, which you can then use.

# Fuel Calculator Instructions

1. Input your zero fuel load (this is a percentage - not a weight in pounds or kilograms). To get this, load however many passengers and how much cargo you want without any fuel, and check the load percentage.

2. Input your projected flight time obtained from SimBrief, converted into a decimal (for example: 1 hour 30 minutes is 1.5, 3 hours 12 minutes is 3.2). Since the age requirement here is 13, I hope you guys can handle this. SimBrief times are generally a little longer than Infinite Flight flight times, so this extra fuel will make up for the excessive fuel you use on your climb out.

3. Fuel needed is (approximately) how much fuel you need to complete the flight. Please never take off with this load as there’s probably a good chance you won’t make it. Fuel with reserves adds an hour flight at 50% load worth of fuel. This will translate to an extra 45 minutes of flight time with most aircraft, which should be safe. I added a third section because I know a lot of you fly overnights where you don’t step climb.

I tried to make the calculator as usable as possible, but it isn’t idiot proof. If you give it an impossible set of requirements, most of the time it will tell you it isn’t possible. However, you need to use some common sense here. If you’re within 500 pounds of maxing out your fuel in the fuel needed section, maybe that’s not the smartest flight to take. Please use some common sense.

Note that all calculator values are simply based off trends and are not tested. So before you trust your account’s violation history on it, perhaps test it by bringing a little extra fuel and seeing how much you actually burn.

# Closing Remarks

Honestly, this topic was long overdue but I’m glad I finally got it done. Doing all of this was tedious to say the least but I hope that the community appreciates it and finds it useful. Please do let me know if anything is mistyped in here or if my numbers are significantly off so that I can fix it.

Now I can retire in peace.

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That’s fantastic thank you so much Andrew!

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Presenting Andrew Wu. The hero we needed but didn’t deserve.

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Also grow a spine and ask someone yourself.

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Haven’t even read it all. Just wanted to say… fabulous

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I figured Discord would be quicker you absolute oatmeal egg

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Taking this time (time that I should have used more wisely) to acknowledge the absolute irony of the platform being called “Discord”.

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I mean all we do is argue on there anyways

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Might as well argue here too. Hang on a minute.

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How about we don’t do that

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Thanks for this guide, it will be really interesting and useful.
I will use it for my next flight!

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Amazing topic, beautiful work !

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Also I ask that other regulars don’t edit the main post just so I can keep track of what goes on

do it, i wanna see 🍿

But alas I am lazy

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