Cheapest return flights from San Francisco to London in December from $547

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

01 Dec - 09 Dec TAP
08 Dec - 22 Dec SWISS
11 Dec - 29 Dec SWISS
23 Dec - 09 Jan SWISS
17 Dec - 07 Jan SWISS
17 Dec - 01 Jan TAP
22 Dec - 04 Jan TAP
24 Dec - 04 Jan TAP
18 Dec - 29 Dec SWISS
24 Dec - 01 Jan TAP
11 Dec - 04 Jan FrenchBee
20 Dec - 10 Jan SWISS
20 Dec - 04 Jan TAP
19 Dec - 04 Jan WestJet
21 Dec - 31 Dec Icelandair

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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