Cheap flights from London to Seattle (LHR–SEA)
LHRLondon Heathrow Airport
United Kingdom
United Kingdom
SEASeattle–Tacoma International Airport
United States
United States
Alaska Airlines, British Airways, Delta Air Lines and Virgin Atlantic fly London to Seattle (LHR–SEA) nonstop and back, a great-circle distance of 7,700 km (4,790 mi).
- From
- LHR
- London
- To
- SEA
- Seattle
- Nonstop
- Yes · 4 airlines
- Airlines
- AS · BA · DL · VS
- Cheapest fare found
- £346 one-way
- Distance
- 7,700 km (4,790 mi)
- Time difference
- Seattle 8 hours behind
- Most flights
- British Airways
- Time in the air
- 9h 11m · 8h 33m back
- On time (Touchdown Index)
- 75.5%
- Flights a week
- AS ~4 · BA ~7 · DL ~3 · VS ~7
- Aircraft seen
- Airbus A330-900 · Boeing 787-9 Dreamliner · Boeing 787-10 Dreamliner
Checked against sources:· How we verify
London to Seattle fares by month
Cheapest one-way fare found: £346 for June 2027 on Icelandair (1 stop). Nonstop from £420.
- Oct ’26£454
- Nov ’26£433
- Jan ’27£686
- Feb ’27£347
- Apr ’27£379
- Jun ’27£346
- Jul ’27£420
- Aug ’27£364
Cheapest one-way fares per month of departure in the Aviasales price cache, found . Fares change by the hour: the live fare is shown when you search.
When to fly LHR–SEA
For London Heathrow (LHR) to Seattle–Tacoma (SEA), June 2027 had the lowest fare found (£346). Days in Seattle average 18–28 °C in May, June, July, August and September. Set your watch 8 hours back on landing at SEA.
London to Seattle: frequently asked questions
Fares: Aviasales price cache, 8 October 2026; tracked flights between 6 September and 3 October 2026, from public ADS-B data.
How much is a flight from London Heathrow (LHR) to Seattle–Tacoma (SEA)?
From £346 one-way, the cheapest fare found for June 2027 on Icelandair with 1 stop; nonstop from £420 (found 8 October 2026).
How long is the LHR–SEA flight?
9h 11m wheels-up to wheels-down, the median of 56 tracked flights; SEA–LHR took 8h 33m.
Which airlines fly LHR–SEA direct?
Alaska Airlines, British Airways, Delta Air Lines and Virgin Atlantic.
What is the cheapest month to fly LHR–SEA?
June 2027, at £346; the dearest month found was £686.
What is the time difference between London and Seattle?
Seattle is 8 hours behind London: a LHR departure at noon is 04:00 local time in SEA.
Is LHR–SEA usually on time?
75.5% of 159 LHR–SEA flights landed within 15 minutes of their usual time; 3.1% were over an hour late.
How many LHR–SEA flights a week?
Alaska Airlines 4, British Airways 7, Delta Air Lines 3 and Virgin Atlantic 7 each way.
What aircraft fly LHR–SEA?
Airbus A330-900, Boeing 787-9 Dreamliner and Boeing 787-10 Dreamliner.
Seattle to London: the return flight (SEA–LHR)
All 4 airlines also fly SEA–LHR nonstop.
The return takes 8h 33m in the air (median of 106 tracked flights), 38 minutes shorter than LHR–SEA.
Airlines flying LHR–SEA nonstop
| Airline | Usually takes off (LHR time) | Type | Alliance | Notes |
|---|---|---|---|---|
 Alaska Airlines AS | — | full-service | oneworld | — |
 British Airways BA | 10:09–10:46 | full-service | oneworld | — |
 Delta Air Lines DL | — | full-service | SkyTeam | — |
 Virgin Atlantic VS | 11:57–12:28 | full-service | SkyTeam | — |
One-stop alternatives to flying LHR–SEA nonstop
One airline on both legs; check it's sold as one ticket.
- Via Dublin (DUB) with
Aer Lingus: 7,730 km (4,800 mi) flown, almost no further than nonstop. - Via Keflavík (KEF) with
Icelandair: 7,710 km (4,790 mi) flown, almost no further than nonstop. - Via Calgary (YYC) with
WestJet: 7,740 km (4,810 mi) flown, 1% further than nonstop. - Via Paris (CDG) with
Air France: 8,400 km (5,220 mi) flown, 9% further than nonstop. - Via Minneapolis (MSP) with Delta Air Lines: 8,690 km (5,400 mi) flown, 13% further than nonstop.
LHR–SEA route map
More from London and Seattle
Other arrivals in United States
Also nonstop from LHR, nearest to SEA first (straight-line distance):
- Portland (PDX) airport guide · 208 km (129 mi) from SEA
- LHR–SFO: San Francisco · 1,090 km (679 mi) from SEA
- Salt Lake City (SLC) airport guide · 1,110 km (688 mi) from SEA
- LHR–LAS: Las Vegas · 1,390 km (867 mi) from SEA
- LHR–LAX: Los Angeles · 1,540 km (955 mi) from SEA
Explore the airlines’ route maps
- Alaska Airlines route map and destinations
- British Airways route map and destinations
- Delta Air Lines route map and destinations
- Virgin Atlantic route map and destinations
Plan your arrival at Seattle–Tacoma International Airport (SEA)
Departure
London Heathrow Airport
Heathrow (LHR), London. In our data, 81 airlines fly nonstop from LHR to 213 destinations.
View LHR airport guide →Arrival
Seattle–Tacoma International Airport
2 ways into Seattle, fastest from 25 min:
- Link light rail (1 Line) 38–40 min · $3
- Taxi or rideshare 25–45 min
Weather in Seattle vs London
Seattle is warmer than London in 4 months and cooler in 0; the biggest gap is in August (25°C against 23°C). In October it averages 16°C in Seattle and 16°C in London.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seattle | 9° | 10° | 12° | 15° | 19° | 22° | 25° | 25° | 22° | 16° | 11° | 8° |
| London | 9° | 9° | 12° | 16° | 19° | 22° | 24° | 23° | 21° | 16° | 12° | 9° |
Average daily highs. Climate normals from Climate of Seattle and Climate of London (Wikipedia, CC BY-SA), which cite the national weather services.
Onward from Seattle
Places you can't fly to nonstop from LHR, but can from SEA — for a stopover or a second leg.
Related routes
Sources
- en.wikipedia.org — airlines and destinations, checked 2026-10-01
- en.wikipedia.org — airlines and destinations, checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- mediacentre.britishairways.com — Gatwick–Bangkok year-round from 2026
- en.wikipedia.org — current destination list, cross-checked 2026-09-25 (terminated routes removed)
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
- en.wikipedia.org — airlines and destinations table (passenger), checked 2026-10-01
Flight tracking: adsb.lol community ADS-B data (CC0), 6 September – 3 October 2026. Times are median wheels-up to wheels-down; add taxiing for gate-to-gate.
Report a change — seen something different at the airport or on the airline's site? We re-check and log corrections publicly.