Cheapest return flights from Oslo to Keflavik in September from $118

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

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

Return flights

11 Sep - 23 Sep Norwegian direct
02 Sep - 09 Sep Norwegian direct
09 Sep - 23 Sep Norwegian direct
11 Sep - 25 Sep Norwegian direct
30 Sep - 14 Oct Norwegian direct
03 Sep - 06 Sep Scandinavian Airlines direct
10 Sep - 13 Sep Scandinavian Airlines direct
09 Sep - 25 Sep Norwegian direct
02 Sep - 04 Sep Norwegian direct
25 Sep - 14 Oct Norwegian direct
30 Sep - 07 Oct Norwegian direct
12 Sep - 15 Sep Scandinavian Airlines
01 Sep - 10 Sep Scandinavian Airlines direct
25 Sep - 07 Oct Norwegian direct
30 Sep - 05 Oct Norwegian direct
30 Sep - 19 Oct Norwegian direct
30 Sep - 06 Oct Norwegian
29 Sep - 05 Oct Scandinavian Airlines
27 Sep - 01 Oct Ryanair
29 Sep - 02 Oct Scandinavian Airlines

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

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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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