AirHint found the following cheapest one-way flights from San Francisco (SFO) to London (LHR) in December 2025 (see full year).

One-Way flights

12 Dec	WestJet
16 Dec	WestJet
31 Dec	Air Canada
31 Dec	Air France	direct
08 Dec	Hawaiian Airlines
08 Dec	Iberia	direct
25 Dec	Flair Airlines
12 Dec	Virgin Atlantic	direct
26 Dec	WestJet
16 Dec	Lufthansa	direct

Also check the deals for return flights from San Francisco to London in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest one-way flights from San Francisco to London in December from 261€

One-Way flights