AirHint found the following cheapest return flights from Oslo (OSL) to Keflavik (KEF) in January 2026 (see full year).

Return flights

01 Jan - 15 Jan	Scandinavian Airlines
11 Jan - 18 Jan	Scandinavian Airlines
01 Jan - 04 Jan	Scandinavian Airlines
08 Jan - 11 Jan	Ryanair
02 Jan - 04 Jan	Scandinavian Airlines
02 Jan - 05 Jan	Scandinavian Airlines
26 Jan - 29 Jan	Scandinavian Airlines
01 Jan - 15 Jan	Icelandair	direct
03 Jan - 06 Jan	Scandinavian Airlines
11 Jan - 18 Jan	Icelandair	direct

Also check the deals for one-way flights from Oslo to Keflavik in January.

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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Cheapest return flights from Oslo to Keflavik in January from 145€

Return flights