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

One-Way flights

11 Dec	Pegasus Airlines
06 Dec	Pegasus Airlines
25 Dec	Wizz Air UK
02 Dec	Vueling Airlines
22 Dec	Air Serbia
03 Dec	Vueling Airlines
23 Dec	Air Europa
09 Dec	Vueling Airlines
15 Dec	Vueling Airlines
30 Dec	Vueling Airlines

Also check the deals for return flights from Istanbul to Porto 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 Porto in December from 87€

One-Way flights