Alaska Airlines Flights from United States to United Kingdom
Deals on one-way flights from United States to United Kingdom.*
Seattle (SEA)to
London (LHR)Seattle (SEA)to
London (LHR)Seattle (SEA)to
London (LHR)Seattle (SEA)to
London (LHR)Los Angeles (LAX)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.
One-way low-fare flights United States to United Kingdom.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Jul 1, 2026 | From $420 Seen: 13 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Sep 14, 2026 | From $420 Seen: 16 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Aug 9, 2026 | From $420 Seen: 16 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Aug 19, 2026 | From $420 Seen: 1 hour ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Nov 9, 2026 | From $420 Seen: 17 minutes ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Sep 8, 2026 | From $420 Seen: 31 minutes ago | |
| Portland (PDX) | London (LHR) | One-way | Saver | Depart: Sep 20, 2026 | From $453 Seen: 16 hours ago | |
| Portland (PDX) | London (LHR) | One-way | Saver | Depart: Sep 13, 2026 | From $965 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.