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

Return flights

16 Mar - 19 Mar	Scandinavian Airlines
06 Mar - 11 Mar	TAP
21 Mar - 30 Mar	TAP
06 Mar - 14 Mar	Scandinavian Airlines
23 Mar - 23 Apr	TAP
23 Mar - 31 Mar	TAP
06 Mar - 09 Mar	Scandinavian Airlines
02 Mar - 14 Mar	Scandinavian Airlines
14 Mar - 21 Mar	Scandinavian Airlines
12 Mar - 17 Mar	Scandinavian Airlines
20 Mar - 30 Mar	KLM
25 Mar - 01 Apr	Virgin Atlantic
30 Mar - 14 Apr	Air France
30 Mar - 16 Apr	Air France
29 Mar - 14 Apr	United
24 Mar - 07 Apr	Delta
25 Mar - 07 Apr	Delta
31 Mar - 14 Apr	KLM
23 Mar - 07 Apr	Iberia	direct
30 Mar - 14 Apr	British Airways	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 418€

Return flights