Seattle to London (SEA-LHR): Nonstop Upgrade & Award Space
British Airways, Delta Air Lines, Alaska Airlines, Inc., Virgin Atlantic, and American Airlines fly nonstop between Seattle (SEA) and London (LHR), roughly 39 times a week. Because so many carriers compete on this route, premium seats turn over daily, and upgrade or award space can open and close within hours. 2LNR tracks confirmed availability on every SEA to LHR departure, so you know which flights have space before you book.
Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.
Confirmed upgrade & award space on every SEA to LHR departure
2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for Seattle to London to see which departures have real space, or watch the route and get alerted when space opens.
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.
- British Airways
- Delta Air Lines
- Alaska Airlines, Inc.
- Virgin Atlantic
- American Airlines
Frequently asked questions about SEA to LHR
How far is London from Seattle?
Which airlines fly nonstop from SEA to LHR?
How many flights a week are there from SEA to LHR?
How do I check upgrade or award availability on SEA to LHR?
Never miss SEA to LHR upgrade or award space
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