Alaska Airlines Cheap Flights from London to United States
Deals on one-way flights from London to United States.*
London (LHR)to
Seattle (SEA)London (LHR)to
Seattle (SEA)London (LHR)to
Seattle (SEA)*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 London to United States.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| London (LHR) | Seattle (SEA) | One-way | Saver | Depart: Sep 2, 2026 | From $527 Seen: 1 day ago | |
| London (LHR) | Seattle (SEA) | One-way | Saver | Depart: Aug 26, 2026 | From $583 Seen: 1 day ago | |
| London (LHR) | Los Angeles (LAX) | One-way | Saver | Depart: Sep 3, 2026 | From $615 Seen: 2 hours ago | |
| London (LHR) | Seattle (SEA) | One-way | Saver | Depart: Nov 25, 2026 | From $618 Seen: 20 hours ago | |
| London (LHR) | Seattle (SEA) | One-way | Saver | Depart: Oct 2, 2026 | From $653 Seen: 4 hours ago | |
| London (LHR) | Seattle (SEA) | One-way | Saver | Depart: Oct 8, 2026 | From $654 Seen: 15 hours ago | |
| London (LHR) | Seattle (SEA) | One-way | Saver | Depart: Oct 13, 2026 | From $665 Seen: 4 hours ago | |
| London (LHR) | Los Angeles (LAX) | One-way | Saver | Depart: Aug 29, 2026 | From $731 Seen: 1 day ago | |
| London (LHR) | Los Angeles (LAX) | One-way | Saver | Depart: Jul 10, 2026 | From $766 Seen: 19 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.