AirHint found the following cheapest return flights from Istanbul (IST) to Oslo (OSL) in May 2026 (see full year).

Return flights

23 May - 31 May	Air Serbia
01 May - 03 May	Air Serbia
31 May - 03 Jun	Air Serbia
24 May - 30 May	Air Serbia
15 May - 21 May	Air Serbia
11 May - 16 May	Air Serbia
01 May - 08 May	Air Serbia
16 May - 23 May	Air Serbia
11 May - 15 May	Air Serbia
19 May - 21 May	Wizz Air UK
01 May - 05 May	Lufthansa
31 May - 03 Jun	Turkish Airlines	direct

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

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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Cheapest return flights from Istanbul to Oslo in May from 189€

Return flights