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

Return flights

16 Apr - 22 Apr	LEVEL
16 Apr - 20 Apr	LEVEL
30 Apr - 16 May	jetBlue
28 Apr - 04 May	TAP
15 Apr - 22 Apr	Aer Lingus
23 Apr - 27 Apr	LEVEL
23 Apr - 28 Apr	LEVEL
15 Apr - 20 Apr	Hawaiian Airlines
09 Apr - 15 Apr	LEVEL
02 Apr - 13 Apr	Turkish Airlines
02 Apr - 12 Apr	Turkish Airlines
24 Apr - 01 May	TAP
04 Apr - 12 Apr	Turkish Airlines

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

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 April from $674

Return flights