Cheapest return flights from San Francisco to London in April from $577

Best time to book flights for San Francisco (SFO) to London (LGW) flights at AirHint

AirHint found the following cheapest return flights from San Francisco (SFO) to London (LGW) in April 2025 (see full year).

Return flights

04 Apr - 29 Apr Sun Country Airlines
02 Apr - 08 Apr Brussels Airlines
30 Apr - 02 May Hawaiian Airlines
30 Apr - 06 May British Airways
27 Apr - 07 May Frontier Airlines
29 Apr - 28 May Frontier Airlines
04 Apr - 20 Apr Frontier Airlines
05 Apr - 19 Apr Frontier Airlines
16 Apr - 22 Apr SWISS
21 Apr - 08 May SWISS
02 Apr - 16 Apr Frontier Airlines
02 Apr - 07 Apr Frontier Airlines
30 Apr - 10 May British Airways
10 Apr - 25 Apr Frontier Airlines
08 Apr - 28 Apr SWISS
01 Apr - 06 Apr Frontier Airlines
30 Apr - 12 May Iberia
23 Apr - 06 May SWISS
15 Apr - 15 May SWISS
27 Apr - 13 May Frontier Airlines

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

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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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