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

Return flights

03 Mar - 11 Mar	Scandinavian Airlines
13 Mar - 22 Mar	Scandinavian Airlines
16 Mar - 23 Mar	Scandinavian Airlines
06 Mar - 22 Mar	Scandinavian Airlines
03 Mar - 11 Mar	British Airways	direct
22 Mar - 29 Mar	United
16 Mar - 23 Mar	Finnair	direct
22 Mar - 29 Mar	British Airways	direct
08 Mar - 15 Mar	British Airways	direct
08 Mar - 15 Mar	United

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 464€

Return flights