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

Return flights

01 Dec - 08 Dec	Pegasus Airlines
11 Dec - 13 Dec	Pegasus Airlines
01 Dec - 08 Dec	Pegasus Airlines	direct
08 Dec - 11 Dec	Pegasus Airlines
08 Dec - 11 Dec	Pegasus Airlines	direct
25 Dec - 28 Dec	Lufthansa
27 Dec - 02 Jan	Pegasus Airlines
11 Dec - 13 Dec	Pegasus Airlines	direct
23 Dec - 23 Dec	Pegasus Airlines
25 Dec - 28 Dec	Turkish Airlines	direct
25 Dec - 25 Dec	Pegasus Airlines

Also check the deals for one-way flights from Istanbul to Oslo 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 Istanbul to Oslo in December from 154€

Return flights