AirHint found the following cheapest return flights from San Francisco (SFO) to Keflavik (KEF) in September 2026 (see full year).
Return flights
| 15 Sep - 24 Sep | Scandinavian Airlines | ||
| 08 Sep - 15 Sep | Scandinavian Airlines | ||
| 04 Sep - 11 Sep | jetBlue | ||
| 04 Sep - 12 Sep | Icelandair | ||
| 05 Sep - 13 Sep | jetBlue | ||
| 05 Sep - 12 Sep | jetBlue |
Also check the deals for one-way flights from San Francisco to Keflavik in September.
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