Cheapest return flights from San Francisco to London in April from $440

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

Return flights

23 Apr - 27 Apr TAP
16 Apr - 22 Apr TAP
17 Apr - 01 May TAP
25 Apr - 02 May TAP
25 Apr - 01 May TAP
13 Apr - 20 Apr Scandinavian Airlines
14 Apr - 21 Apr Scandinavian Airlines
27 Apr - 06 May Scandinavian Airlines
14 Apr - 05 May Scandinavian Airlines
22 Apr - 13 May Aer Lingus
08 Apr - 24 Apr Air Canada
05 Apr - 21 Apr United
01 Apr - 15 Apr KLM
06 Apr - 20 Apr Air Canada
01 Apr - 10 Apr Lufthansa
01 Apr - 13 Apr Lufthansa
22 Apr - 13 May British Airways direct
24 Apr - 03 May Scandinavian Airlines
25 Apr - 02 May Air France direct
17 Apr - 01 May Austrian Airlines direct

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

Powered by

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.

Book a cheap hotel in London

Cheap car rent in London

Feel free to contact us with any feedback or request another flight research.