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

Return flights

19 Mar - 23 Mar	Scandinavian Airlines
05 Mar - 08 Mar	Scandinavian Airlines
08 Mar - 15 Mar	Scandinavian Airlines
01 Mar - 04 Mar	Icelandair	direct
02 Mar - 05 Mar	Scandinavian Airlines
08 Mar - 15 Mar	Icelandair	direct
10 Mar - 13 Mar	Icelandair	direct
07 Mar - 14 Mar	Icelandair	direct
03 Mar - 06 Mar	Icelandair	direct
04 Mar - 07 Mar	Icelandair	direct

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

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 March from $195

Return flights