Cheapest return flights from Oslo to Istanbul in September from $113

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
24 Sep - 01 Oct British Airways
28 Sep - 01 Oct Norwegian direct
24 Sep - 01 Oct Pegasus Airlines direct
28 Sep - 15 Oct Norwegian direct
13 Sep - 21 Sep Ryanair
13 Sep - 21 Sep Pegasus Airlines direct
28 Sep - 05 Oct Air Serbia
17 Sep - 05 Oct Norwegian direct
28 Sep - 05 Oct Norwegian 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.

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