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

Return flights

01 Dec - 06 Dec	Ryanair
01 Dec - 16 Dec	Norwegian
08 Dec - 13 Dec	Wizz Air
10 Dec - 11 Dec	Norwegian
01 Dec - 10 Dec	Norwegian
05 Dec - 07 Dec	Pegasus Airlines	direct
04 Dec - 07 Dec	Pegasus Airlines	direct
01 Dec - 04 Dec	Ryanair
15 Dec - 21 Dec	Ryanair
08 Dec - 13 Dec	Pegasus Airlines	direct
30 Dec - 09 Jan	Pegasus Airlines	direct
10 Dec - 05 Jan	Norwegian
10 Dec - 05 Jan	Pegasus Airlines	direct
28 Dec - 01 Jan	airBaltic
24 Dec - 01 Jan	LOT
21 Dec - 07 Jan	LOT
24 Dec - 03 Jan	LOT
21 Dec - 03 Jan	Air Serbia
19 Dec - 03 Jan	Scandinavian Airlines
26 Dec - 01 Jan	LOT

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

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 Oslo to Istanbul in December from 129€

Return flights