AirHint found the following cheapest return flights from San Francisco (SFO) to Keflavik (KEF) in March 2026 (see full year).
Return flights
| 08 Mar - 13 Mar | Alaska Airlines | ||
| 03 Mar - 08 Mar | Frontier Airlines | ||
| 03 Mar - 09 Mar | Frontier Airlines | ||
| 04 Mar - 08 Mar | Lufthansa | ||
| 14 Mar - 22 Mar | Aer Lingus |
Also check the deals for one-way flights from San Francisco to Keflavik in March.
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