Cheapest return flights from San Francisco to London in December from $781

Best time to book flights for San Francisco (SFO) to London (LGW) flights at AirHint

AirHint found the following cheapest return flights from San Francisco (SFO) to London (LGW) in December 2025 (see full year).

Return flights

26 Dec - 01 Jan TAP
17 Dec - 04 Jan TAP
11 Dec - 20 Dec SWISS
23 Dec - 09 Jan SWISS
25 Dec - 08 Jan SWISS
29 Dec - 05 Jan SWISS
18 Dec - 04 Jan Air Canada
19 Dec - 01 Jan TAP
18 Dec - 26 Dec Breeze Airways
21 Dec - 02 Jan Breeze Airways
20 Dec - 02 Jan SWISS

Also check the deals for one-way flights from San Francisco to London in December.

Skyscanner

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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