Cheapest return flights from San Diego to Keflavik in December from 744€

AirHint found the following cheapest return flights from San Diego (SAN) to Keflavik (KEF) in December 2025 (see full year).

Return flights

16 Dec - 07 Jan Alaska Airlines
23 Dec - 28 Dec Alaska Airlines
21 Dec - 29 Dec Frontier Airlines
20 Dec - 29 Dec Frontier Airlines
28 Dec - 02 Jan Frontier Airlines
26 Dec - 02 Jan Frontier Airlines
23 Dec - 03 Jan Frontier Airlines
26 Dec - 03 Jan Frontier Airlines

Also check the deals for one-way flights from San Diego to Keflavik in December.

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