Lowest Priced Flights to London on Alaska Airlines starting at $325*
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Most popular flights to London on Alaska Airlines.*
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Seattle (SEA)to
London (LHR)Sep 8, 2026 - Sep 22, 2026
From
$930
Seen: 3 hours ago
Round-trip
Saver
Seattle (SEA)to
London (LHR)Aug 19, 2026 - Sep 16, 2026
From
$1,030
Seen: 6 hours ago
Round-trip
Saver
Seattle (SEA)to
London (LHR)Aug 24, 2026 - Sep 10, 2026
From
$1,030
Seen: 7 hours ago
Round-trip
Saver
Seattle (SEA)to
London (LHR)Aug 24, 2026 - Aug 29, 2026
From
$1,080
Seen: 1 hour ago
Round-trip
Saver
Seattle (SEA)to
London (LHR)Aug 15, 2026 - Aug 22, 2026
From
$1,130
Seen: 2 hours ago
Round-trip
Saver
Portland (PDX)to
London (LHR)Aug 26, 2026 - Sep 2, 2026
From
$1,142
Seen: 3 hours ago
Round-trip
Saver
Portland (PDX)to
London (LHR)Sep 5, 2026 - Sep 18, 2026
From
$1,193
Seen: 2 hours ago
Round-trip
Saver
Portland (PDX)to
London (LHR)Aug 15, 2026 - Aug 22, 2026
From
$1,242
Seen: 9 hours ago
Round-trip
Saver
Portland (PDX)to
London (LHR)Aug 31, 2026 - Sep 25, 2026
From
$1,372
Seen: 9 hours ago
Round-trip
Saver
Los Angeles (LAX)to
London (LHR)Aug 15, 2026 - Aug 22, 2026
From
$1,190
Seen: 10 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.
Top offers for London one-way flights.*
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From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Nov 11, 2026 | From $325 Seen: 7 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Nov 24, 2026 | From $325 Seen: 7 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Nov 8, 2026 | From $325 Seen: 3 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Dec 9, 2026 | From $325 Seen: 15 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Nov 23, 2026 | From $325 Seen: 10 hours ago | |
| Seattle (SEA) | London (LHR) | One-way | Saver | Depart: Jan 17, 2027 | From $325 Seen: 2 hours ago | |
| Portland (PDX) | London (LHR) | One-way | Saver | Depart: Apr 6, 2027 | From $339 Seen: 9 hours ago | |
| Portland (PDX) | London (LHR) | One-way | Saver | Depart: Nov 9, 2026 | From $339 Seen: 7 hours ago | |
| Portland (PDX) | London (LHR) | One-way | Saver | Depart: Nov 18, 2026 | From $339 Seen: 1 hour ago | |
| San Francisco (SFO) | London (LHR) | One-way | Saver | Depart: Jan 4, 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.