Cheapest return flights from Keflavik to Oslo in September from $140

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

Return flights

30 Sep - 16 Oct Norwegian direct
30 Sep - 21 Oct Norwegian direct
23 Sep - 14 Oct Norwegian direct
23 Sep - 07 Oct Norwegian direct
30 Sep - 14 Oct Norwegian direct
23 Sep - 12 Oct Norwegian direct
23 Sep - 09 Oct Norwegian direct
30 Sep - 07 Oct Norwegian direct
14 Sep - 21 Sep Wizz Air
30 Sep - 12 Oct Norwegian direct
30 Sep - 09 Oct Norwegian direct
23 Sep - 25 Sep Norwegian direct
23 Sep - 28 Sep Norwegian direct
28 Sep - 30 Sep Wizz Air
11 Sep - 16 Sep Wizz Air
21 Sep - 28 Sep Wizz Air
18 Sep - 23 Sep Norwegian direct
02 Sep - 21 Sep Norwegian direct
02 Sep - 23 Sep Norwegian direct
13 Sep - 20 Sep Wizz Air

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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