Cheapest return flights from San Francisco to London in December from 554€

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

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

Return flights

01 Dec - 11 Dec Scandinavian Airlines
01 Dec - 09 Dec Aer Lingus
03 Dec - 09 Dec Aer Lingus
07 Dec - 16 Dec United
01 Dec - 11 Dec Finnair direct
07 Dec - 16 Dec British Airways direct
26 Dec - 10 Jan TAP
27 Dec - 04 Jan TAP
23 Dec - 09 Jan Iberia direct
12 Dec - 02 Jan British Airways direct
15 Dec - 05 Jan SWISS
01 Dec - 09 Dec Brussels Airlines direct
03 Dec - 09 Dec Brussels Airlines direct
21 Dec - 28 Dec Lufthansa
20 Dec - 03 Jan TAP
15 Dec - 05 Jan British Airways direct
25 Dec - 03 Jan Air Canada
27 Dec - 04 Jan British Airways direct
18 Dec - 03 Jan Lufthansa

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

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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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