Seattle to London
Flights from Seattle to London
Seattle (SEA) has nonstop flights to London Heathrow (LHR) on four airlines, so the choice comes down to schedule, cabin, alliance and fare rather than routing. Alaska Airlines joined the route in 2026, alongside British Airways, Delta and Virgin Atlantic.
- Flight time
- About 9 hr 30 min nonstop to London
- Airlines flying direct
- Alaska, British Airways, Delta and Virgin Atlantic
- Airports
- Seattle (SEA) to London Heathrow (LHR)
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When to book
Fares to London usually rise in summer, around Christmas and New Year, and during UK school holidays. Spring and fall often bring more choice, and booking early helps if you want a particular cabin.
Direct vs. one-stop
Nonstop is the norm from Seattle, with four airlines to compare. A one-stop itinerary rarely makes sense here unless it saves meaningfully or suits an onward connection in Europe.
When to call a travel expert
If this trip involves a stopover, a premium cabin, family seating, or anything urgent, a named expert can handle the whole itinerary in one conversation.
Comparing the Seattle to London nonstops
Four airlines fly nonstop from Seattle to London Heathrow: Alaska Airlines, British Airways, Delta and Virgin Atlantic. Alaska added a daily nonstop in May 2026 on a Boeing 787-9 Dreamliner. Most flights leave Seattle in the evening and land in London the next afternoon.
Alaska Airlines and British Airways are both oneworld members, while Delta and Virgin Atlantic are SkyTeam partners, so the airline that suits you may depend on which miles you collect. Departure times, cabins and Heathrow terminals differ between airlines, which affects how rested you feel on arrival and how easy an onward connection is.
When you call, your expert compares all four nonstops for your dates, explains the change, refund and baggage rules for the exact fare, and quotes the full price before you agree to anything.
What our agents recommend for Seattle to London
Choose seats for how you travel
An aisle is usually better if you need to stretch or use the restroom often; a window suits someone who prefers to settle in and sleep, which matters on an overnight flight. For couples, two aisle seats across from each other keep you close without one person being stuck in the middle. Premium seating is worth comparing if the extra room would make a real difference, but check the actual aircraft and seat first: extra-legroom economy isn't the same as a separate premium cabin.
Want the best seat for an overnight flight? Call and we'll compare the cabins on all four airlines.
Call +1 (650) 514-3905The cabin and seat matter more than the logo
No airline is best for everyone, so we compare the actual flight, seat and fare rules for your dates rather than choosing on reputation alone. A higher price doesn't automatically mean you can cancel for a refund, so we read the ticket rules with you. If you already have miles or status with one airline, that may tip the balance.
What happens when you call
We ask your dates, how flexible you are, who's traveling and where you're staying, then talk about budget, seating preferences and any airport assistance. Before you pay, you get a written itinerary and price breakdown showing the total, including any agency fees. We check names against passports and explain when to expect your tickets and who to contact for help.
Continuing to Europe after London? Call and we'll plan the onward flight on the same booking.
Call +1 (650) 514-3905Common questions
Which airlines fly nonstop from Seattle to London?
Alaska Airlines, British Airways, Delta and Virgin Atlantic fly nonstop from Seattle to London Heathrow. Schedules vary by season, so your expert confirms what's flying on your dates.
How long is the flight from Seattle to London?
About 9 hours 30 minutes nonstop to London. The return to Seattle usually takes a little longer because of headwinds.
When does Alaska Airlines fly to London?
Alaska Airlines began a daily Seattle to London Heathrow nonstop in May 2026 on a Boeing 787-9, leaving Seattle in the evening and arriving the next afternoon.
Which airline is best from Seattle to London?
It depends on your dates, cabin, budget and the miles you collect. Alaska and British Airways are oneworld partners; Delta and Virgin Atlantic are SkyTeam partners. Your expert compares all four for your trip.
Can I connect onward from London to Europe?
Yes. Heathrow has connections across Europe. Tell your expert your final destination so they can keep the whole trip on one booking.
Also see: Seattle to Rome, Seattle to Seoul, Seattle to Paris
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