AirHint found the following cheapest return flights from San Francisco (SFO) to London (LGW) in September 2026 (see full year).
Return flights
| 18 Sep - 25 Sep | Alaska Airlines | ||
| 20 Sep - 01 Oct | Scandinavian Airlines | ||
| 19 Sep - 03 Oct | LEVEL | ||
| 06 Sep - 20 Sep | Turkish Airlines | ||
| 09 Sep - 23 Sep | Condor |
Also check the deals for one-way flights from San Francisco to London in September.
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