AirHint found the following cheapest one-way flights from San Francisco (SFO) to London (LHR) in April 2026 (see full year).
One-Way flights
| 21 Apr | LEVEL | ||
| 30 Apr | LEVEL | ||
| 19 Apr | LEVEL | ||
| 28 Apr | LEVEL | ||
| 14 Apr | LEVEL | ||
| 01 Apr | KLM | ||
| 06 Apr | Lufthansa | ||
| 08 Apr | SWISS | ||
| 13 Apr | Hawaiian Airlines | ||
| 25 Apr | Alaska Airlines |
Also check the deals for return flights from San Francisco to London in April.
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