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

Return flights

23 Sep - 30 Sep	Wizz Air
23 Sep - 01 Oct	Norwegian
25 Sep - 02 Oct	Wizz Air
23 Sep - 25 Sep	Wizz Air
21 Sep - 26 Sep	Pegasus Airlines
23 Sep - 29 Sep	Wizz Air
17 Sep - 23 Sep	Pegasus Airlines	direct
15 Sep - 24 Sep	Ryanair
20 Sep - 27 Sep	Pegasus Airlines	direct
15 Sep - 29 Sep	Wizz Air
21 Sep - 29 Sep	Pegasus Airlines	direct
15 Sep - 18 Sep	Ryanair
23 Sep - 06 Oct	Norwegian
25 Sep - 05 Oct	Wizz Air
23 Sep - 02 Oct	Wizz Air
22 Sep - 02 Oct	Pegasus Airlines	direct
30 Sep - 01 Oct	Norwegian
23 Sep - 03 Oct	Wizz Air
23 Sep - 05 Oct	Wizz Air
30 Sep - 02 Oct	Wizz Air

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

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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Cheapest return flights from Oslo to Istanbul in September from 128€

Return flights