Cheapest return flights from London to San Francisco in December from $538

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

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

Return flights

04 Dec - 08 Dec TAP
03 Dec - 08 Dec Scandinavian Airlines
25 Dec - 06 Jan SWISS
10 Dec - 31 Dec TAP
08 Dec - 15 Dec SWISS
02 Dec - 24 Dec SWISS
15 Dec - 14 Jan SWISS
07 Dec - 21 Dec Aer Lingus
01 Dec - 21 Dec Aer Lingus
15 Dec - 22 Dec Lufthansa
01 Dec - 07 Dec SWISS
16 Dec - 29 Dec SWISS
31 Dec - 05 Jan United
15 Dec - 14 Jan Brussels Airlines direct
27 Dec - 12 Jan Lufthansa
28 Dec - 10 Jan SWISS
28 Dec - 10 Jan British Airways direct
12 Dec - 02 Jan TAP
16 Dec - 02 Jan TAP
22 Dec - 05 Jan United

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