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

Return flights

03 Dec - 11 Dec	easyJet
04 Dec - 09 Dec	easyJet
08 Dec - 15 Dec	easyJet
01 Dec - 09 Dec	easyJet
02 Dec - 09 Dec	easyJet
01 Dec - 05 Dec	easyJet
05 Dec - 09 Dec	easyJet
01 Dec - 07 Dec	easyJet
01 Dec - 06 Dec	easyJet
16 Dec - 13 Jan	Vueling Airlines
31 Dec - 03 Jan	Vueling Airlines
27 Dec - 30 Dec	Transavia France
26 Dec - 04 Jan	Ryanair

Also check the deals for one-way flights from Porto 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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Cheapest return flights from Porto to Istanbul in December from 155€

Return flights