Alaska Airlines Flights from United States to United Kingdom
expand_more
1 Passenger
expand_moretoday
today
Deals on roundtrip flights from United States to United Kingdom.*
flight_takeoff
flight_land
sortkeyboard_arrow_down
Seattle (SEA)to
London (LHR)Sep 11, 2026 - Oct 1, 2026
From
$981
Seen: 3 hours ago
Round-trip
Saver
Seattle (SEA)to
London (LHR)Sep 12, 2026 - Sep 22, 2026
From
$981
Seen: 1 hour ago
Round-trip
Saver
Seattle (SEA)to
London (LHR)Aug 17, 2026 - Aug 25, 2026
From
$1,031
Seen: 10 hours ago
Round-trip
Saver
Seattle (SEA)to
London (LHR)Sep 7, 2026 - Sep 18, 2026
From
$1,031
Seen: 12 hours ago
Round-trip
Saver
Seattle (SEA)to
London (LHR)Sep 9, 2026 - Oct 7, 2026
From
$1,031
Seen: 14 hours ago
Round-trip
Saver
Portland (PDX)to
London (LHR)Aug 22, 2026 - Sep 8, 2026
From
$1,193
Seen: 4 hours ago
Round-trip
Saver
Portland (PDX)to
London (LHR)Aug 17, 2026 - Sep 6, 2026
From
$1,193
Seen: 11 hours ago
Round-trip
Saver
Portland (PDX)to
London (LHR)Aug 21, 2026 - Aug 28, 2026
From
$1,193
Seen: 13 hours ago
Round-trip
Saver
Portland (PDX)to
London (LHR)Sep 2, 2026 - Sep 9, 2026
From
$1,367
Seen: 1 hour ago
Round-trip
Saver
Portland (PDX)to
London (LHR)Sep 2, 2026 - Sep 28, 2026
From
$1,417
Seen: 7 hours ago
Round-trip
Saver
San Francisco (SFO)to
London (LHR)Sep 13, 2026 - Sep 17, 2026
From
$971
Seen: 8 hours ago
Round-trip
Saver
San Francisco (SFO)to
London (LHR)Sep 11, 2026 - Sep 25, 2026
From
$1,004
Seen: 11 hours ago
Round-trip
Saver
San Francisco (SFO)to
London (LHR)Aug 29, 2026 - Sep 8, 2026
From
$1,186
Seen: 1 hour ago
Round-trip
Saver
San Francisco (SFO)to
London (LHR)Aug 29, 2026 - Sep 2, 2026
From
$1,186
Seen: 15 hours ago
Round-trip
Saver
Los Angeles (LAX)to
London (LHR)Sep 12, 2026 - Sep 23, 2026
From
$1,004
Seen: 1 hour ago
Round-trip
Saver
Los Angeles (LAX)to
London (LHR)Sep 4, 2026 - Sep 12, 2026
From
$1,869
Seen: 5 hours ago
Round-trip
Saver
*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.*
flight_takeoff
flight_land
sortkeyboard_arrow_down
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: May 12, 2027 | From $325 Seen: 6 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: May 10, 2027 | From $325 Seen: 10 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Apr 20, 2027 | From $325 Seen: 7 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Dec 8, 2026 | From $325 Seen: 6 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Mar 15, 2027 | From $325 Seen: 11 hours ago | |
| Portland (PDX) | London (LHR) | One-way | Saver | Depart: May 11, 2027 | From $339 Seen: 6 hours ago | |
| Portland (PDX) | London (LHR) | One-way | Saver | Depart: Apr 14, 2027 | From $339 Seen: 14 hours ago | |
| Portland (PDX) | London (LHR) | One-way | Saver | Depart: May 9, 2027 | From $339 Seen: 5 hours ago | |
| Anchorage (ANC) | London (LHR) | One-way | Saver | Depart: Nov 29, 2026 | From $339 Seen: 1 hour ago | |
| San Francisco (SFO) | London (LHR) | One-way | Saver | Depart: Feb 16, 2027 | From $347 Seen: 13 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.