AirHint found the following cheapest one-way flights from Istanbul (IST) to Tehran (IKA) in December 2025 (see full year).

One-Way flights

04 Dec	Pegasus Airlines	direct
09 Dec	Pegasus Airlines	direct
03 Dec	Pegasus Airlines	direct
02 Dec	Pegasus Airlines	direct
06 Dec	Pegasus Airlines	direct
11 Dec	Pegasus Airlines	direct
12 Dec	Pegasus Airlines	direct
29 Dec	Pegasus Airlines	direct
01 Dec	Pegasus Airlines	direct
30 Dec	Pegasus Airlines

Also check the deals for return flights from Istanbul to Tehran 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 one-way flights from Istanbul to Tehran in December from 53€

One-Way flights