Cheapest return flights from San Francisco to London in April from $439

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

Return flights

23 Apr - 30 Apr TAP
16 Apr - 30 Apr Scandinavian Airlines
21 Apr - 05 May Scandinavian Airlines
27 Apr - 07 May Scandinavian Airlines
20 Apr - 16 May Scandinavian Airlines
01 Apr - 08 Apr Air Canada
29 Apr - 23 May Scandinavian Airlines
01 Apr - 08 Apr British Airways direct
08 Apr - 07 May British Airways direct
08 Apr - 13 Apr Air Canada
04 Apr - 25 Apr Air Canada
05 Apr - 25 Apr Air Canada
06 Apr - 14 Apr Delta
02 Apr - 22 Apr Air Canada
04 Apr - 18 Apr Air Canada
08 Apr - 02 May Air Canada
07 Apr - 02 May Air Canada
08 Apr - 02 May British Airways direct
07 Apr - 02 May Iberia direct
27 Apr - 07 May British Airways direct

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

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