Delta Announces Seattle to London Heathrow - Another Move Against AA

This is a continuation of Delta Defends Against AA/AS - Adds New Seattle to Dallas/Ft. Worth Route

Delta has announced another route: Seattle to London Heathrow.

Once again, this is obviously a response to American Airlines’ new Seattle to London Heathrow route set to launch in 2021.

Delta will be launching its own Seattle to London Heathrow route in 2021 complementing its partner Virgin Atlantic’s twice daily LHR-SEA service.

The aircraft for this route has not been announced yet.

Delta previously served Seattle to London Heathrow a few years ago until it dropped its service for nonstop Portland to London Heathrow and gave its Seattle to London flight over to Virgin Atlantic.

Once American and Delta launch their new routes, there will be 7 daily flights between Seattle and London in the peak season of 2021:

  • 2x daily British Airways
  • 2x daily Virgin Atlantic
  • 1x daily American Airlines
  • 1x daily Delta Airlines
  • 1x daily Norwegian Air (London Gatwick)

Delta Press Release:

The war continues. American could respond with more international service out of Seattle, but Delta’s move is simply a defensive one.


Presumably this would be a 339 or 359?


i’m thinking maybe the a330neo, but I doubt it

Really weird theory here. I’m betting on 767-400 because I feel like Delta’s going to drop Portland to London (operated with 764) after British Airways begins its flight this year.

Though A330neo’s probably the most likely.

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I can totally see that-the 764’s often start a route and get swapped out for 330’s or bigger when the need arises. I suppose unless they’re trying to harmonize the service with VS perhaps?

That would be a 339 buddy. A330-941 aka: 339/A339

Here’s hoping London receive their newer jets. Up until now it’s mostly A330’s and B767’s. Not the Neo or the A350.

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This is absolutely ridiculous. This route cannot possibly have that much demand. We certainly don’t need 4 airlines serving this one route and a 5th to gatwick. What are airlines thinking?!

Money and competition


I think it will be the A330-900. As much as I want another A350 into our City, were need some diversity and an A330Neo would be so cool!

Dang! Delta is really going at American!

It’s the same thing… “neo” just means new engine option and even Airbus calls it the A330neo.

Delta also announced a Minneapolis to Phoenix service with the A330, likely a move against American as well. Really interested to see how this will continue…

(post withdrawn by author, will be automatically deleted in 24 hours unless flagged)

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Did your post just get flagged for that 3 letter word

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Apparently so 😂

Mmm petty [redacted😤] feuds are fun to watch…
Nice to see AA and DL lighting fires under each others rear ends.
Just like SEA DFW on the 221, this is just another sign of DL realizing that they starting something by poaching LATAM.

Can’t wait to watch the money burn 🔥

Trying it again @Ishrion


Interesting to see even more flight on the LHR-SEA route.
On the other hand it’s a pretty reasonable expansion given that DL/VS are not expanding exactly to the level of BA/AA on the route.

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DL/VS will be on the same frequency as AA/BA

Capacity wise, maybe a little less.


True. But (as you wrote) travellers will now be able to choose between (most likely) similarly timed flights on the two competing groups, which makes it a very interesting competition.

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I’m very excited to see so many new routes! It will give us so many more options to fly wide-bodies!

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