Book Cheap Flights from London with Alaska Airlines
Find round-trip flight deals from London.*
*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 flight deals from London.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| London (LHR) | Seattle (SEA) | One-way | Saver | Depart: Sep 29, 2026 | From $513 Seen: 17 hours ago | |
| London (LHR) | Seattle (SEA) | One-way | Saver | Depart: Sep 15, 2026 | From $513 Seen: 17 hours ago | |
| London (LHR) | Seattle (SEA) | One-way | Saver | Depart: Sep 30, 2026 | From $513 Seen: 15 hours ago | |
| London (LHR) | Seattle (SEA) | One-way | Saver | Depart: Oct 5, 2026 | From $513 Seen: 11 hours ago | |
| London (LHR) | Seattle (SEA) | One-way | Saver | Depart: Jun 17, 2026 | From $546 Seen: 9 hours ago | |
| London (LHR) | Seattle (SEA) | One-way | Saver | Depart: Oct 21, 2026 | From $582 Seen: 8 hours ago | |
| London (LHR) | Los Angeles (LAX) | One-way | Saver | Depart: Jul 3, 2026 | From $1,031 Seen: 55 minutes 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.