Cheapest one-way flights from San Francisco to London in April from $285

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

One-Way flights

16 Apr LEVEL
20 Apr Hawaiian Airlines
14 Apr Hawaiian Airlines
25 Apr Frontier Airlines
21 Apr Frontier Airlines
06 Apr Scandinavian Airlines
13 Apr Scandinavian Airlines
05 Apr Scandinavian Airlines
01 Apr Aer Lingus
22 Apr Frontier Airlines

Also check the deals for return 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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