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

One-Way flights

25 Dec	WestJet
06 Dec	Flair Airlines
16 Dec	WestJet
14 Dec	WestJet
10 Dec	Hawaiian Airlines
01 Dec	Alaska Airlines
10 Dec	Virgin Atlantic	direct
09 Dec	British Airways	direct
15 Dec	Hawaiian Airlines
06 Dec	British Airways	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 209€

One-Way flights