Lowest Priced Flights to London on Alaska Airlines starting at $339*
Most popular flights to London on Alaska Airlines.*
Seattle (SEA)to
London (LHR)Seattle (SEA)to
London (LHR)Seattle (SEA)to
London (LHR)Seattle (SEA)to
London (LHR)Seattle (SEA)to
London (LHR)Anchorage (ANC)to
London (LHR)*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.
Top offers for London one-way flights.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Portland (PDX) | London (LHR) | One-way | Saver | Depart: Nov 11, 2026 | From $339 Seen: 10 hours ago | |
| Portland (PDX) | London (LHR) | One-way | Saver | Depart: Oct 4, 2026 | From $339 Seen: 16 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Aug 14, 2026 | From $394 Seen: 8 hours ago | |
| Portland (PDX) | London (LHR) | One-way | Saver | Depart: Sep 10, 2026 | From $453 Seen: 11 hours ago | |
| Portland (PDX) | London (LHR) | One-way | Saver | Depart: Aug 23, 2026 | From $453 Seen: 29 minutes ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Jul 18, 2026 | From $460 Seen: 12 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Jun 14, 2026 | From $469 Seen: 5 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Jul 15, 2026 | From $494 Seen: 15 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Aug 12, 2026 | From $494 Seen: 10 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Oct 21, 2026 | From $494 Seen: 20 minutes ago | |
| Anchorage (ANC) | London (LHR) | One-way | Saver | Depart: Sep 23, 2026 | From $517 Seen: 1 hour ago | |
| Los Angeles (LAX) | London (LHR) | One-way | Saver | Depart: Aug 25, 2026 | From $613 Seen: 9 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.