Seattle to London (SEA-LHR): nonstop upgrade & award space

British Airways, Delta Air Lines, Alaska Airlines, and Virgin Atlantic fly nonstop between Seattle (SEA) and London (LHR), roughly 39 times a week. Long-haul cabins on a corridor this busy are large but never idle: premium cabin inventory reshuffles around every schedule change, and the best dates go first. 2LNR tracks confirmed upgrade and award space on Delta Air Lines and Alaska Airlines, on every SEA to LHR departure, so you know which flights have space before you book.

Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

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39
Nonstop flights a week
4,786 mi
Nonstop distance
Free
To get started

Seattle to London flight schedule

Scheduled nonstop departures for SEA to LHR, last checked against our schedule feed on September 6, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Seattle (SEA) to London (LHR)
Date Flight Airline Departs SEA Arrives LHR Duration Aircraft
BA 52British Airways13:3006:459h 15m781
VS 106Virgin Atlantic17:3011:209h 50m339
DL 292Delta Air Lines18:1511:008h 45m332
BA 48British Airways20:2013:459h 25m77W
AS 100Alaska Airlines, Inc.21:4015:059h 25m789
DL 20Delta Air Lines21:5015:359h 45m339
BA 52British Airways13:3006:459h 15m781
VS 106Virgin Atlantic17:3011:209h 50m339
DL 292Delta Air Lines18:1511:008h 45m332
BA 48British Airways20:2013:459h 25m77W
AS 100Alaska Airlines, Inc.21:4015:059h 25m789
DL 20Delta Air Lines21:5015:359h 45m339
BA 52British Airways13:3006:459h 15m781
VS 106Virgin Atlantic17:3011:209h 50m339
DL 292Delta Air Lines18:1511:008h 45m332
BA 48British Airways20:2013:459h 25m77W
AS 100Alaska Airlines, Inc.21:4015:059h 25m789
DL 20Delta Air Lines21:5015:359h 45m339
BA 52British Airways13:3006:459h 15m781
VS 106Virgin Atlantic17:3011:209h 50m339
DL 292Delta Air Lines18:1511:008h 45m332
BA 48British Airways20:2013:459h 25m77W
AS 100Alaska Airlines, Inc.21:4015:059h 25m789
DL 20Delta Air Lines21:5015:359h 45m339
BA 52British Airways13:3006:459h 15m781
VS 106Virgin Atlantic17:3011:209h 50m339
BA 48British Airways20:2013:459h 25m77W
AS 100Alaska Airlines, Inc.21:4015:059h 25m789
DL 20Delta Air Lines21:5015:359h 45m339
BA 52British Airways13:3006:459h 15m781
VS 106Virgin Atlantic17:3011:209h 50m339
BA 48British Airways20:2013:459h 25m77W
AS 100Alaska Airlines, Inc.21:4015:059h 25m789
DL 20Delta Air Lines21:5015:359h 45m339
BA 52British Airways13:3006:459h 15m781
VS 106Virgin Atlantic17:3011:209h 50m339
BA 48British Airways20:2013:459h 25m77W
AS 100Alaska Airlines, Inc.21:4015:059h 25m789
DL 20Delta Air Lines21:5015:359h 45m339

Showing all 39 scheduled SEA to LHR departures across the next 7 days with service. Later dates are on the interactive map.

Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline has not filed that value in the schedule data we hold. Aircraft are IATA equipment codes as filed, and can change up to departure.

See every SEA to LHR date on the interactive map

Confirmed upgrade & award space on SEA to LHR departures

2LNR tracks confirmed upgrade and award space on Delta Air Lines and Alaska Airlines, segment by segment and date by date. Open the calendar for Seattle to London to see which departures have space, the next 14 days free on every product and the full horizon on Pro.

See real availability

Confirmed upgrade and award seats on each SEA to LHR departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See SEA to LHR on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Seattle to London nonstop

Carriers operating SEA to LHR nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

See SEA to LHR on the interactive map →

Frequently asked questions about SEA to LHR

How far is London from Seattle?
SEA to LHR covers about 4,786 miles nonstop. Flight times vary by aircraft and season; the schedule table on this page lists each scheduled departure with its own times.
Which airlines fly nonstop from SEA to LHR?
British Airways, Delta Air Lines, Alaska Airlines, and Virgin Atlantic fly the route nonstop. 2LNR tracks confirmed upgrade and award space on Delta Air Lines and Alaska Airlines.
How many flights a week are there from SEA to LHR?
About 39 nonstop flights a week run between Seattle and London in the current schedule, operated by British Airways, Delta Air Lines, Alaska Airlines, and Virgin Atlantic. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from SEA to LHR depart?
Scheduled SEA to LHR nonstops in the next 7 days with service leave between 13:30 and 21:50, local time at Seattle. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
How do I check upgrade or award availability on SEA to LHR?
Open the SEA to LHR route on the interactive map or the matrix to see confirmed upgrade and award space by date on Delta Air Lines and Alaska Airlines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens.

Never miss SEA to LHR upgrade or award space

See what is open by date on this route, the next 14 days free on every product and the full horizon on Pro.

Get started free