AirHint found the following cheapest return flights from San Diego (SAN) to Keflavik (KEF) in January 2026 (see full year).
Return flights
| 29 Jan - 05 Feb | Hawaiian Airlines | ||
| 24 Jan - 31 Jan | jetBlue | ||
| 01 Jan - 08 Jan | Alaska Airlines | ||
| 03 Jan - 08 Jan | Frontier Airlines | ||
| 02 Jan - 08 Jan | Frontier Airlines |
Also check the deals for one-way flights from San Diego to Keflavik in January.
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