Cheapest return flights from Oslo to Istanbul in September from 136€

Best time to book flights for Oslo (OSL) to Istanbul (IST) flights at AirHint

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

Return flights

17 Sep - 01 Oct Norwegian direct
07 Sep - 17 Sep Norwegian direct
21 Sep - 01 Oct Norwegian direct
07 Sep - 10 Sep Norwegian direct
21 Sep - 26 Sep Norwegian
19 Sep - 21 Sep Pegasus Airlines direct
18 Sep - 21 Sep Pegasus Airlines direct
04 Sep - 11 Sep Pegasus Airlines direct
03 Sep - 17 Sep Norwegian direct
16 Sep - 23 Sep Pegasus Airlines direct
17 Sep - 28 Sep Norwegian direct
18 Sep - 25 Sep Pegasus Airlines direct
27 Sep - 04 Oct Air Serbia
27 Sep - 04 Oct Turkish Airlines direct

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

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul