Alaska Airlines Opens Bookings For Seattle – London Flights

Over the past year, Alaska Airlines has announced a number of new long-haul routes of out Seattle. With Hawaiian Airlines now under its wings, Alaska is ramping up its long haul game, already launching flights to Incheon (ICN), with plans to start flights to Reykjavik (KEF), Tokyo Narita (NRT) and Rome (FCO) in Q2 2026.

Besides these four, the carrier announced back in August that it would fly to London Heathrow (LHR) from Seattle (SEA). They have since firmed up the route slots, with plans to start service from May 21, 2026. The flights are timed accordingly where customers will have a full day in each city, with hopes of drawing in business travelers as follows:

Flight Number	Origin	Departure Time	Destination	Arrival Time	Frequency
AS100	Seattle (SEA)	9:40 p.m.	London Heathrow (LHR)	3:05 p.m. +1	Daily (Starting May 1, 2026)
AS101	London Heathrow (LHR)	5:00 p.m.	Seattle (SEA)	6:50 p.m.	Daily

Alaska will be going up against stiff competition as the Seattle/London route is already served by three other carriers. British Airways operates 10 flights weekly while Delta Air Lines operates daily flights. Virgin Atlantic also flies between the two cities four times weekly.

Alaska’s 787s will feature the same configuration used by Hawaiian Airlines, with 34 business class suites, and 266 economy class seats. Assuming that things are progressing as they should, Alaska should unveil its first 787 wearing the new northern lights-themed livery sometime in January 2026.

Credit: Alaska Airlines

My guess is the recently delivered N784HA may be the first to wear the new livery, as it was handed over in all-white rather than in Hawaiian colors. They’ve also included the “Operated by Alaska Airlines” text as they as they are still working through the necessary legal paperwork to have all Hawaiian’s aircraft transferred under the Alaska Airlines AOC. It’s possible this was added as the aircraft may enter service for a short time before being repainted.

The first new Boeing 787-9 for Alaska Airlines since the Hawaiian acquisition performing its maiden flight yesterday in an all-white coat. I’m assuming she’ll receive her full revised Alaska 787 livery post-delivery. Catch the Hawaiian Dreamliners while you can! #N784HA pic.twitter.com/B02LTWVMP6

— Devin (@BoeingSCSpotter) November 16, 2025

This is definitely an interesting development, but at least Alaska is going in with some assistance. For starters, because of their oneworld status and friendship with American Airlines, they have been able to access slots at Heathrow, which otherwise could take years to acquire.

Their alliance benefit also means customers can book flights via British Airways onto further destinations, while those flying with Alaska have added connectivity to the United States and the Pacific islands. Flights are now bookable, with economy roundtrip fares starting at $699.

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