AirHint found the following cheapest return flights from San Francisco (SFO) to London (LHR) in January 2026 (see full year).

Return flights

16 Jan - 23 Jan	TAP
14 Jan - 21 Jan	TAP
24 Jan - 02 Feb	TAP
16 Jan - 19 Jan	TAP
21 Jan - 25 Jan	TAP
17 Jan - 29 Jan	TAP
24 Jan - 01 Feb	TAP
21 Jan - 31 Jan	TAP
14 Jan - 19 Jan	TAP
09 Jan - 31 Jan	Scandinavian Airlines
26 Jan - 30 Jan	Scandinavian Airlines
10 Jan - 26 Jan	Scandinavian Airlines
23 Jan - 14 Feb	Scandinavian Airlines
29 Jan - 01 Feb	Scandinavian Airlines
26 Jan - 21 Feb	Scandinavian Airlines
24 Jan - 14 Feb	Scandinavian Airlines
25 Jan - 14 Feb	Scandinavian Airlines
22 Jan - 14 Feb	Scandinavian Airlines
08 Jan - 04 Feb	Scandinavian Airlines
13 Jan - 07 Feb	Scandinavian Airlines

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

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 return flights from San Francisco to London in January from 365€

Return flights