AirHint found the following cheapest one-way flights from San Francisco (SFO) to London (LHR) in April 2026 (see full year).
One-Way flights
| 22 Apr | Flair Airlines | ||
| 20 Apr | Flair Airlines | ||
| 26 Apr | Flair Airlines | ||
| 19 Apr | Flair Airlines | ||
| 27 Apr | WestJet | ||
| 15 Apr | Air Canada | ||
| 17 Apr | Flair Airlines | ||
| 23 Apr | WestJet | ||
| 18 Apr | Air Canada | ||
| 09 Apr | Flair 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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