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

Return flights

18 Mar - 26 Mar	TAP
25 Mar - 02 Apr	TAP
16 Mar - 20 Mar	TAP
16 Mar - 25 Mar	SWISS
13 Mar - 20 Mar	TAP
21 Mar - 29 Mar	SWISS
17 Mar - 31 Mar	Aer Lingus
23 Mar - 18 Apr	Iberia
29 Mar - 04 Apr	SWISS
30 Mar - 25 Apr	Aer Lingus
18 Mar - 04 Apr	SWISS
26 Mar - 18 Apr	SWISS
19 Mar - 30 Mar	Turkish Airlines
13 Mar - 04 Apr	SWISS
02 Mar - 31 Mar	Turkish Airlines
10 Mar - 26 Mar	Turkish Airlines
19 Mar - 11 Apr	Turkish Airlines
20 Mar - 11 Apr	Turkish Airlines
21 Mar - 11 Apr	SWISS
16 Mar - 23 Mar	Turkish Airlines

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 $485

Return flights