Cheapest return flights from Istanbul to Oslo in September from $135

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

Return flights

24 Sep - 12 Oct Norwegian direct
23 Sep - 28 Sep Pegasus Airlines
15 Sep - 22 Sep AJet
24 Sep - 15 Oct Norwegian direct
06 Sep - 21 Sep Pegasus Airlines
02 Sep - 07 Sep Pegasus Airlines
10 Sep - 15 Sep Norwegian
10 Sep - 17 Sep Norwegian direct
10 Sep - 21 Sep Norwegian direct
10 Sep - 14 Sep Norwegian direct
24 Sep - 08 Oct Norwegian direct
24 Sep - 05 Oct Norwegian direct
21 Sep - 12 Oct Norwegian direct
05 Sep - 08 Sep Pegasus Airlines
06 Sep - 09 Sep Pegasus Airlines direct
27 Sep - 02 Oct Wizz Air UK
17 Sep - 08 Oct Norwegian direct
17 Sep - 05 Oct Norwegian direct
28 Sep - 19 Oct Norwegian direct
28 Sep - 12 Oct Norwegian direct

Also check the deals for one-way flights from Istanbul 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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