How long is the flight from Seattle to London Heathrow?

SEA–LHR is 9h 25m nonstop, covering 7,702 km (4,786 mi).

Which airlines fly nonstop from Seattle to London Heathrow?

Alaska Airlines, British Airways, Delta Air Lines, Virgin Atlantic operate this route nonstop.

How much is a flight from Seattle to London Heathrow?

One-way fares on SEA–LHR recently started from $243. The lowest recent fare is for travel in November 2026. Fares change daily, so check current prices before booking.

How often do flights run from Seattle to London Heathrow?

The route is served 7 days a week (24 scheduled departures).

Flights from Seattle to London Heathrow

SEALHR

Seattle–Tacoma International Airport (Seattle, United States) → London Heathrow Airport (London, United Kingdom)

Nonstop: 9h 25m
Distance: 7,702 km
Frequency: 7×/week
One-way from: $243
Airlines: Alaska Airlines, British Airways, Delta Air Lines, Virgin Atlantic

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Fares by month

One-way, per person

Lowest fares Aviasales travelers found in recent searches; some may include a connection. Prices change often — tap a month to see live fares.

Weekly schedule

Monday

DL2016:50→10:409h 50mDelta Air Lines
BA4818:45→12:109h 25mBritish Airways
AS10018:45→12:209h 35mAlaska Airlines

Tuesday

BA5213:30→07:009h 30mBritish Airways
DL2016:50→10:409h 50mDelta Air Lines
AS10018:45→12:209h 35mAlaska Airlines
BA4818:45→12:109h 25mBritish Airways

Wednesday

DL2016:50→10:409h 50mDelta Air Lines
BA4818:45→12:109h 25mBritish Airways
AS10018:45→12:209h 35mAlaska Airlines

Thursday

BA5213:40→07:109h 30mBritish Airways
DL2016:50→10:409h 50mDelta Air Lines
AS10018:45→12:209h 35mAlaska Airlines
BA4818:45→12:109h 25mBritish Airways

Friday

DL2016:50→10:409h 50mDelta Air Lines
BA4818:45→12:109h 25mBritish Airways
AS10018:45→12:209h 35mAlaska Airlines

Saturday

BA5213:40→07:109h 30mBritish Airways
DL2016:50→10:409h 50mDelta Air Lines
BA4818:45→12:109h 25mBritish Airways
AS10018:45→12:209h 35mAlaska Airlines

Sunday

DL2016:50→10:409h 50mDelta Air Lines
BA4818:45→12:109h 25mBritish Airways
AS10018:45→12:209h 35mAlaska Airlines

Seattle to London Heathrow — frequently asked

How long is the flight from Seattle to London Heathrow?: SEA–LHR is 9h 25m nonstop, covering 7,702 km (4,786 mi).
Which airlines fly nonstop from Seattle to London Heathrow?: Alaska Airlines, British Airways, Delta Air Lines, Virgin Atlantic operate this route nonstop.
How much is a flight from Seattle to London Heathrow?: One-way fares on SEA–LHR recently started from $243. The lowest recent fare is for travel in November 2026. Fares change daily, so check current prices before booking.
How often do flights run from Seattle to London Heathrow?: The route is served 7 days a week (24 scheduled departures).