Seattle to London (SEA–LHR) — Airlines, Schedules & Connections
No flights match your filters.
No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
SEA–LHR is served by 4 airlines with nonstop service. British Airways, Alaska Airlines and Delta Air Lines lead the route. The flight covers 4,786 miles in approximately 9h 25m. Beyond nonstop, 1-stop connecting options are also available.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| BA British Airways Also: AY, EI, IB | 18 | 77W, 781 | 8h36-9h15 | Oneworld | AY, EI, IB | |
| AS Alaska Airlines | 7 | 789 | 9h20 | Oneworld | – | |
| DL Delta Air Lines Also: SK, SV | 7 | 339 | 9h45 | SkyTeam | SK, SV | |
| VS Virgin Atlantic Also: SV | 7 | 339 | 9h50 | SkyTeam | SV |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Travel Essentials
SEA: PDT · LHR: BST
When it's 6:00 PM in Seattle, it's 2:00 AM (next day) in London.
US citizens need a UK Electronic Travel Authorisation (ETA) before travel, applied for online. The ETA costs GBP 10 and is valid for multiple entries over 2 years. Stays are permitted for up to 6 months per visit. Passport must be valid for the duration of stay.
Declare goods over GBP 390 in value. UK duty-free allowances apply on goods from outside the UK.
Link Light Rail runs from downtown Seattle (Westlake station) to the airport in 38 minutes ($3.50 peak). Trains run every 6–12 minutes during peak hours from 5am to 1am. Ride-shares run $30–50 from downtown; SR-99 and I-5 can be heavily congested southbound during afternoon rush (3–7pm).
Sound Transit 574 express bus serves Tacoma ($2.50–4). Sounder commuter rail connects Tacoma to the airport area via a shuttle.
Heathrow Express runs every 15 minutes to Paddington (15 min, £25). Piccadilly line is slower (50–60 min) but £5.50 with Oyster. National Express coaches serve all terminals from Victoria (60–90 min, £6–10). Black cabs cost £50–90 to central London depending on traffic and time of day.
Mild maritime climate. Summers average 18–23°C with long daylight hours. Winters are 2–7°C, rarely below freezing. Rain is frequent year-round but rarely heavy. Pack layers and a waterproof jacket regardless of season. Fog can disrupt flights November through February.
SEA–LHR Quick Facts
Frequently Asked Questions
Flights from SEA to LHR
Seattle–Tacoma International Airport (SEA) and London Heathrow Airport (LHR) are connected by nonstop service from British Airways, Alaska Airlines, Delta Air Lines and Virgin Atlantic. With 102 weekly departures, this is a heavily served route.
SEA to LHR Flight Duration and Schedule
Nonstop flight time from SEA to LHR is about 9 hours 25 minutes gate to gate. The route covers a distance of 4,786 miles (7,702 km). There are approximately 102 weekly flights outbound and 106 return, totaling 208 flights per week in both directions.
Connecting Options and Alternatives
1-stop connecting options are also available, commonly via Vancouver, Portland and Dublin. Two-stop connections are also available via intermediate hubs.