Cheapest return flights from Oslo to Keflavik in December from $146

Best time to book flights for Oslo (OSL) to Keflavik (KEF) flights at AirHint

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

Return flights

01 Dec - 04 Dec Scandinavian Airlines
04 Dec - 07 Dec Scandinavian Airlines
14 Dec - 17 Dec Scandinavian Airlines
16 Dec - 19 Dec Scandinavian Airlines direct
08 Dec - 11 Dec Scandinavian Airlines direct
17 Dec - 20 Dec Scandinavian Airlines direct
11 Dec - 14 Dec Scandinavian Airlines
07 Dec - 10 Dec Icelandair direct
02 Dec - 05 Dec Icelandair direct
11 Dec - 14 Dec Icelandair direct
30 Dec - 02 Jan Scandinavian Airlines
26 Dec - 01 Jan Ryanair
28 Dec - 04 Jan Scandinavian Airlines
29 Dec - 01 Jan Scandinavian Airlines
30 Dec - 02 Jan Icelandair direct
28 Dec - 04 Jan Icelandair direct
29 Dec - 01 Jan Icelandair direct
26 Dec - 01 Jan Icelandair direct
22 Dec - 04 Jan Scandinavian Airlines
31 Dec - 03 Jan Icelandair direct

Also check the deals for one-way flights from Oslo 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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