As of July 3, 2026, Seattle Tacoma International Airport says Alaska’s new London Heathrow and Reykjavik flights are now part of its 2026 international expansion. The airport says Heathrow is daily and year round, while Reykjavik is a daily seasonal option built around peak summer demand.
The traveler value is the split between two different Europe use cases. London gives Seattle flyers a year round nonstop into one of the biggest onward connection hubs, while Reykjavik offers a more targeted Iceland and North Atlantic trip with fewer moving parts.
- Port of Seattle says Alaska added new nonstop service from SEA to London Heathrow and Reykjavik.
- Heathrow service is daily and year round.
- Reykjavik service is daily and seasonal.
- Port of Seattle says the two routes pushed SEA past 60 international services.
- Alaska says the London and Reykjavik additions are part of its broader global expansion from Seattle.
Why This Matters
Not every route launch helps travelers in the same way, and this pair is useful because the two destinations solve different planning problems. Heathrow works as a broad Europe gateway, while Reykjavik works better for travelers who want Iceland itself or a simpler North Atlantic stop without changing planes on the continent.
The year round versus seasonal split matters too. A traveler planning fall or winter Europe trips can treat Heathrow as a steadier option, while Reykjavik is strongest for summer travel windows that match the route’s operating season.
Planning Impact
If your trip is headed beyond London, Heathrow is the cleaner first check because Alaska and its partners can turn one nonstop into a wider Europe connection day. If the real goal is Iceland, Reykjavik is the more direct planning answer and avoids a second airport stop before the trip even starts.
Travelers should still match the route to the calendar. Port of Seattle and Alaska both frame Reykjavik as a seasonal service, so anyone planning shoulder season or winter travel should verify dates before treating it like a year round option.
Does Alaska now fly from Seattle to London Heathrow nonstop?
Yes. Port of Seattle and Alaska say the Heathrow route is now operating daily and year round from SEA.
Is the Reykjavik route year round too?
No. Alaska describes Reykjavik as a daily seasonal service rather than a year round route.
Why would a traveler pick Heathrow over Reykjavik?
Heathrow is the better choice for broader Europe connections, while Reykjavik is the simpler match for Iceland focused trips.
What changed at SEA because of these launches?
Port of Seattle says the two flights pushed the airport’s international service count above 60 options.
Image: Official image courtesy of Port of Seattle
