AirHint found the following cheapest one-way flights from San Francisco (SFO) to London (LHR) in April 2026 (see full year).
One-Way flights
| 19 Apr | WestJet | ||
| 29 Apr | WestJet | ||
| 27 Apr | WestJet | ||
| 11 Apr | Flair Airlines | ||
| 02 Apr | Flair Airlines | ||
| 23 Apr | WestJet | ||
| 17 Apr | WestJet | ||
| 16 Apr | WestJet | ||
| 15 Apr | Aer Lingus | ||
| 01 Apr | Aer Lingus |
Also check the deals for return flights from San Francisco to London in April.
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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