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

Return flights

05 Dec - 08 Dec	SKY express
09 Dec - 12 Dec	easyJet
08 Dec - 15 Dec	easyJet
03 Dec - 10 Dec	Ryanair
04 Dec - 08 Dec	Ryanair
02 Dec - 09 Dec	Ryanair
10 Dec - 13 Dec	easyJet
04 Dec - 07 Dec	easyJet
11 Dec - 14 Dec	Ryanair
08 Dec - 14 Dec	easyJet
29 Dec - 13 Jan	Pegasus Airlines
14 Dec - 04 Jan	SKY express
26 Dec - 07 Jan	Ryanair
14 Dec - 03 Jan	SKY express
14 Dec - 02 Jan	SKY express
12 Dec - 02 Jan	SKY express
26 Dec - 03 Jan	Ryanair
29 Dec - 03 Jan	Pegasus Airlines
14 Dec - 01 Jan	SKY express
12 Dec - 01 Jan	SKY express

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

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Cheapest return flights from Lisbon to Istanbul in December from 166€

Return flights