Alaska Airlines Flights from Seattle to London
expand_more
1 Passenger
expand_moretoday
today
Lowest fares from Seattle to London
location_on
location_on
One-way low-fare flights Seattle to London.*
flight_takeoff
flight_land
$
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Jul 20, 2026 | From $415 Seen: 1 day ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Sep 23, 2026 | From $415 Seen: 1 day ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Sep 21, 2026 | From $290 Seen: 5 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Sep 17, 2026 | From $379 Seen: 11 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Nov 4, 2026 | From $415 Seen: 15 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Nov 11, 2026 | From $415 Seen: 10 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Aug 12, 2026 | From $415 Seen: 8 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Aug 9, 2026 | From $415 Seen: 3 hours ago |
*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.