AirHint found the following cheapest return flights from San Francisco (SFO) to Keflavik (KEF) in January 2026 (see full year).
Return flights
| 28 Jan - 03 Feb | jetBlue | ||
| 22 Jan - 02 Feb | Brussels Airlines | ||
| 19 Jan - 26 Jan | TAP | ||
| 14 Jan - 21 Jan | TAP | ||
| 18 Jan - 25 Jan | Icelandair |
Also check the deals for one-way flights from San Francisco to Keflavik in January.
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