| Outbound | Return | Airlines | Shop | Baggage | Price | ||
|---|---|---|---|---|---|---|---|
| Seattle-Tacoma London Heathrow | Outbound 09/19/25 1 Stopover (KEF) FI0680, FI0450 12h 10min | Return 09/29/25 1 Stopover (KEF) FI0455, FI0683 31h 15min |  Icelandair |  | $502 | ||
| Best option Seattle-Tacoma London Heathrow | Outbound 07/25/25 direct IB3506 09h 20min | Return 08/17/25 direct IB3507 09h 50min |  Iberia |  | $689 | ||
| Seattle-Tacoma London Heathrow | Outbound 09/19/25 2 Stopovers (LAX, FRA) AS1144, DE2087, LH0914 20h 40min | Return 09/29/25 2 Stopovers (FRA, BOS) LH0923, DE2038, AS0393 20h 05min |    Alaska Airlines, Condor, Lufthansa |  | $1,109 | ||
| Seattle-Tacoma London Heathrow | Outbound 09/19/25 1 Stopover (KEF) FI0680, FI0450 12h 10min | Return 09/29/25 1 Stopover (KEF) FI0455, FI0683 31h 15min | Icelandair |  | $504 | ||
| Seattle-Tacoma London Heathrow | Outbound 09/19/25 1 Stopover (KEF) FI0680, FI0450 12h 10min | Return 09/29/25 1 Stopover (KEF) FI0455, FI0683 31h 15min | Icelandair |  | ? | $511 | |
| Seattle-Tacoma London Heathrow | Outbound 09/19/25 1 Stopover (KEF) FI0680, FI0450 12h 10min | Return 09/29/25 1 Stopover (KEF) FI0455, FI0683 31h 15min | Icelandair |  | ? | $530 | |
| Seattle-Tacoma London Heathrow | Outbound 09/19/25 1 Stopover (KEF) FI0680, FI0450 12h 10min | Return 09/29/25 1 Stopover (KEF) FI0455, FI0683 31h 15min | Icelandair |  | ? | $536 | |
| Seattle-Tacoma London Heathrow | Outbound 09/19/25 2 Stopovers (YVR, YUL) AC8803, AC0308, AC0864 16h 00min | Return 09/29/25 1 Stopover (YUL) AC0867, AC0515 18h 01min |  Air Canada |  | ? | $637 | |
| Seattle-Tacoma London Heathrow | Outbound 09/19/25 1 Stopover (KEF) FI0680, FI0450 12h 10min | Return 09/29/25 1 Stopover (KEF) FI0451, FI0683 15h 35min | Icelandair |  | $662 | ||
| Seattle-Tacoma London Heathrow | Outbound 07/25/25 2 Stopovers (ATL, CPH) SK3284, SK0930, SK0503 22h 15min | Return 08/17/25 1 Stopover (CPH) SK1508, SK0937 26h 20min |  SAS Scandinavian Airlines | | ? | $670 |
Stops
- Direct flight
Airline
- Icelandair
- Air Canada
- British Airways
- Iberia
- Alaska Airlines
Tips and tricks to help you find cheap flights from Seattle Tacoma to London Heathrow
Favorite airline: Icelandair
The majority of passengers on the route Seattle-Tacoma – London Heathrow prefer to fly with Icelandair.
Icelandair
39 %
Virgin Atlantic
23 %
Air Canada
14 %
Direct flights are more expensive
Flights with a stopover are on average $138.00 cheaper than direct flights.
non stop flight
1 stop
2 stops
09h 20min
19h 55min
20h 00min
$601
$463
$1,060
Favourite connection: via Reykjavik-Keflavik
54 % of booked tickets on this route are for flights with a transfer in Reykjavik-Keflavik.
Route
bookings
1 stopover Reykjavik-Keflavik International
19h 55min, from $463
54 %
Direct flights
09h 20min, from $601
22 %
1 stopover Dublin
13h 45min, from $600
10 %
Important flight information
Flight information: Seattle-Tacoma - London Heathrow
| Roundtrip from | $501.93 |
|---|---|
| Flight duration | min. 09:20 / max. 09:30 |
| Return flight duration | min. 09:50/ max. 09:55 |
| Distance | 7710 km |
| Flights per week | 19 |
| Departure airport | Airport Seattle-Tacoma International Airport, WA (SEA) |
| Arrival airport | Airport London Heathrow (LHR) |
| Destination country | Flights to United Kingdom |
Alternative routes to United Kingdom
- Flight Seattle-Tacoma - London from $502
Alternative flights to London Heathrow
- Flight Los Angeles - London Heathrow from $533
- Flight Boston - London Heathrow from $456
- Flight Detroit - London Heathrow from $540
- Flight Washington DC - London Heathrow from $491
- Flight Chicago O'Hare - London Heathrow from $509
- Flight Baltimore - London Heathrow from $488
- Flight Denver - London Heathrow from $534
- Flight Newark - London Heathrow from $439
- Flight Philadelphia - London Heathrow from $607
Flight destinations with a similar price
- Flight London Heathrow - Colombo from $686
- Flight London Heathrow - Abu Dhabi from $378
- Flight London Heathrow - Toronto from $412
- Flight London Heathrow - Cologne from $120
- Flight London Heathrow - Dusseldorf from $104
- Flight London Heathrow - Frankfurt from $139
- Flight London Heathrow - Barcelona from $126
- Flight London Heathrow - Ahmedabad from $501
- Flight London Heathrow - Amritsar from $635
- Flight London Heathrow - Erbil from $484
Flight destinations with a similar price
- Flight Seattle-Tacoma - Kahului from $483
- Flight Seattle-Tacoma - Kona from $468
- Flight Seattle-Tacoma - Lihue from $474
- Flight Seattle-Tacoma - London from $502
- Flight Seattle-Tacoma - Port of Spain from $534
- Flight Seattle-Tacoma - Dublin from $522