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
30 Jan - 06 Feb	TAP
30 Jan - 07 Feb	TAP
23 Jan - 30 Jan	TAP
16 Jan - 22 Jan	TAP
19 Jan - 29 Jan	TAP
17 Jan - 31 Jan	TAP
21 Jan - 31 Jan	TAP
16 Jan - 27 Jan	TAP
17 Jan - 27 Jan	TAP
17 Jan - 30 Jan	TAP
24 Jan - 31 Jan	TAP
26 Jan - 02 Feb	Scandinavian Airlines
30 Jan - 03 Feb	Lufthansa
25 Jan - 01 Feb	British Airways	direct
26 Jan - 02 Feb	British Airways	direct
30 Jan - 03 Feb	Austrian Airlines	direct
30 Jan - 06 Feb	Austrian Airlines	direct

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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from San Francisco to London in January from 420€

Return flights