AirHint found the following cheapest return flights from San Francisco (SFO) to Keflavik (KEF) in August 2026 (see full year).
Return flights
| 11 Aug - 21 Aug | United | ||
| 06 Aug - 29 Aug | Lufthansa | ||
| 10 Aug - 17 Aug | Lufthansa | ||
| 09 Aug - 29 Aug | Lufthansa |
Also check the deals for one-way flights from San Francisco to Keflavik in August.
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