Cheapest return flights from Porto to Istanbul in December from $259

Best time to book flights for Porto (OPO) to Istanbul (IST) flights at AirHint

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

Return flights

01 Dec - 08 Dec easyJet
25 Dec - 31 Dec Air France
09 Dec - 14 Dec easyJet
28 Dec - 03 Jan KLM
30 Dec - 03 Jan KLM
23 Dec - 30 Dec KLM
29 Dec - 02 Jan easyJet
23 Dec - 31 Dec KLM
26 Dec - 31 Dec Air Serbia
28 Dec - 02 Jan easyJet
26 Dec - 03 Jan Air Serbia
29 Dec - 03 Jan easyJet
30 Dec - 02 Jan easyJet
26 Dec - 02 Jan Air Serbia
26 Dec - 29 Dec Air Serbia
26 Dec - 01 Jan Air Serbia
26 Dec - 04 Jan Air Serbia
23 Dec - 28 Dec KLM
23 Dec - 28 Dec Turkish Airlines direct
23 Dec - 29 Dec Turkish Airlines direct

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

Skyscanner

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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul