Cheapest return flights from San Francisco to Keflavik in December from 723€

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

Return flights

23 Dec - 30 Dec Lufthansa
24 Dec - 31 Dec Southwest Airlines
22 Dec - 29 Dec Scandinavian Airlines
25 Dec - 01 Jan Scandinavian Airlines
21 Dec - 28 Dec Lufthansa
27 Dec - 03 Jan Sun Country Airlines
26 Dec - 02 Jan Alaska Airlines
20 Dec - 27 Dec Scandinavian Airlines

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

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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