$512 Cheap Alaska Airlines flights San Francisco (SFO) to London (LHR)

View $512 flight on Sat, Jul 25, 2026Opens in a new window

$512 Cheap Alaska Airlines flights San Francisco (SFO) to London (LHR)

Prices were available within the past 7 days and start at $512 for one-way flights and $1,028 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, Jul 25 - Tue, Aug 18
SFO
San Francisco
LHR
London
$1,028 Roundtrip, found 2 days ago
$1,028
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Jul 25 from San Francisco to London, returning Tue, Aug 18, priced at $1,028 found 2 days ago

Find the cheapest month to fly from San Francisco (SFO) to London (LHR)

February is typically the cheapest month to fly

From $445 - $813 per traveler.

Travel information

Origin airport
San Francisco Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, JetBlue Airways, KLM, LOT-Polish Airlines, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Popular airline
United
Distance
8567 km
Average flight time
18 hours 30 mins

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