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

Return flights

02 Mar - 12 Mar	TAP
11 Mar - 18 Mar	TAP
02 Mar - 10 Mar	TAP
11 Mar - 20 Mar	TAP
11 Mar - 20 Mar	Virgin Atlantic	direct
02 Mar - 14 Mar	Scandinavian Airlines
10 Mar - 17 Mar	Scandinavian Airlines
10 Mar - 14 Mar	Scandinavian Airlines
06 Mar - 13 Mar	Scandinavian Airlines
18 Mar - 30 Mar	TAP
28 Mar - 04 Apr	Scandinavian Airlines
28 Mar - 08 Apr	Delta
18 Mar - 04 Apr	Delta
27 Mar - 05 Apr	Delta
18 Mar - 04 Apr	Air France	direct
28 Mar - 04 Apr	Air France	direct
27 Mar - 10 Apr	Lufthansa
27 Mar - 05 Apr	Austrian Airlines	direct

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

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 March from 399€

Return flights