KIAD (Dulles airport), KDCA (Ronald Reagan airport), and KBWI (Thurgood Marshall airport).
This might be a clone of @Plane-Train-TV’s idea, but it’s a great idea for an FNF and I have even more reasons for why these 3 airports should be featured.
This airport has 3 parallel runways (all capable of supporting heavies) and a 4th one if necesssary. ATC can just bring arrivals from the west onto the left runway, and arrivals from the east onto the right runway. The center runway can be used for departures only, meaning that it is easy to get a lot of arrivals in in a short amount of time, and easy to get departures out quickly too. A 4th runway is also available for GA (its approach path intersects the other runways though). This airport offers many unique views and has loads of IRL destinations. It has loads of gates for any type of aircraft. It has only been in an FNF once since global came out, and almost never on the ATC schedule. It needs more attention.
This airport is small, but it’s still a good airport for an FNF. Besides, small airports need a bit more attention! While it can’t accomodate heavies, this airport has a lot of gates for 737s, A320s, and more. It also has some gates for GA and regional jets. It has one main runway for aircraft from A319/737-700s to 757s and A321s. A second runway can be used for aircraft smaller than an A319/737-700, meaning that ATC can separate slower planes, reducing stress. This airport is the busiest of DC airports, and while there are few destinations more than 1000 nm away, there are plenty of destinations within 1000 nm, so this airport is great for those who like to do short haul. Best of all, it has the stunning river visual approach. It has never been featured in an FNF, and I think it needs more attention.
This airport offers beautiful views on departure and arrival. This airport has 2 runways capable or supporting heavies, and a third runway for GA. This is easy for ATC because one runway can be used for departures, and another for arrivals. It has plenty of gates for 737s/A320s, and other medium haul aircraft. It also has a lot of destinations (mainly domestic, but still). This airport has been in one FNF since global and I would like to see it featured.
All 3 airports have rarely been featured on the ATC schedule.