Cheapest return flights from Oslo to Keflavik in September from 123€

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

21 Sep - 30 Sep Norwegian direct
21 Sep - 25 Sep Norwegian direct
16 Sep - 30 Sep Norwegian direct
16 Sep - 25 Sep Norwegian direct
09 Sep - 16 Sep Norwegian direct
09 Sep - 25 Sep Norwegian direct
02 Sep - 16 Sep Norwegian direct
02 Sep - 09 Sep Norwegian direct
02 Sep - 11 Sep Norwegian direct
21 Sep - 02 Oct Norwegian direct
18 Sep - 30 Sep Norwegian direct
16 Sep - 02 Oct Norwegian direct
21 Sep - 05 Oct Norwegian direct
18 Sep - 02 Oct Norwegian direct
16 Sep - 05 Oct Norwegian direct
18 Sep - 05 Oct Norwegian direct
27 Sep - 12 Oct Ryanair
27 Sep - 12 Oct Icelandair direct

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