Cheapest return flights from Keflavik to Oslo in September from $125

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

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

Return flights

09 Sep - 21 Sep Norwegian direct
23 Sep - 14 Oct Norwegian direct
02 Sep - 09 Sep Norwegian direct
02 Sep - 11 Sep Norwegian direct
02 Sep - 04 Sep Norwegian direct
09 Sep - 11 Sep Norwegian direct
23 Sep - 12 Oct Norwegian direct
25 Sep - 14 Oct Norwegian direct
16 Sep - 21 Sep Norwegian direct
16 Sep - 18 Sep Norwegian direct
09 Sep - 18 Sep Norwegian direct
23 Sep - 05 Oct Norwegian direct
23 Sep - 02 Oct Norwegian direct
25 Sep - 12 Oct Norwegian direct
16 Sep - 05 Oct Norwegian direct
16 Sep - 02 Oct Norwegian direct
02 Sep - 07 Sep Norwegian direct
02 Sep - 21 Sep Norwegian direct
25 Sep - 16 Oct Norwegian direct
25 Sep - 05 Oct Norwegian direct

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

Skyscanner

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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