AirHint found the following cheapest one-way flights from San Francisco (SFO) to London (LGW) in April 2026 (see full year).
One-Way flights
| 29 Apr | Alaska Airlines | ||
| 28 Apr | Alaska Airlines | ||
| 26 Apr | Alaska Airlines | ||
| 13 Apr | Aer Lingus | ||
| 08 Apr | Aer Lingus | ||
| 24 Apr | SWISS | ||
| 02 Apr | Alaska Airlines | ||
| 12 Apr | LEVEL | ||
| 09 Apr | LEVEL | ||
| 06 Apr | SWISS |
Also check the deals for return flights from San Francisco to London in April.
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