AirHint found the following cheapest one-way flights from San Francisco (SFO) to London (LHR) in September 2026 (see full year).
One-Way flights
| 27 Sep | LEVEL | ||
| 24 Sep | LEVEL | ||
| 13 Sep | LEVEL | ||
| 29 Sep | LEVEL | ||
| 01 Sep | KLM | ||
| 12 Sep | Air Canada | ||
| 25 Sep | Lufthansa | ||
| 27 Sep | Virgin Atlantic | direct | |
| 11 Sep | SWISS | ||
| 01 Sep | British Airways | direct |
Also check the deals for return flights from San Francisco to London in September.
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