Cheapest return flights from Keflavik to Oslo in September from $148

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

Return flights

08 Sep - 15 Sep Norwegian direct
15 Sep - 06 Oct Norwegian direct
10 Sep - 15 Sep Norwegian direct
27 Sep - 06 Oct Norwegian direct
27 Sep - 18 Oct Norwegian direct
17 Sep - 06 Oct Norwegian direct
15 Sep - 01 Oct Norwegian direct
10 Sep - 01 Oct Norwegian direct
27 Sep - 01 Oct Norwegian direct
17 Sep - 01 Oct Norwegian direct
15 Sep - 17 Sep Norwegian direct
08 Sep - 10 Sep Norwegian direct
08 Sep - 17 Sep Norwegian direct
27 Sep - 08 Oct Norwegian direct
17 Sep - 08 Oct Norwegian direct
10 Sep - 17 Sep Norwegian direct
13 Sep - 15 Sep Norwegian direct
06 Sep - 15 Sep Norwegian direct
06 Sep - 08 Sep Norwegian direct
15 Sep - 18 Sep Scandinavian Airlines

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

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