AirHint found the following cheapest return flights from Lisbon (LIS) to Istanbul (IST) in September 2026 (see full year).

Return flights

09 Sep - 11 Sep	SKY express
02 Sep - 11 Sep	SKY express
02 Sep - 04 Sep	SKY express
06 Sep - 11 Sep	SKY express
04 Sep - 11 Sep	SKY express
02 Sep - 13 Sep	SKY express
01 Sep - 12 Sep	easyJet
10 Sep - 14 Sep	Aegean Airlines
02 Sep - 06 Sep	SKY express
01 Sep - 16 Sep	easyJet
30 Sep - 05 Oct	easyJet
25 Sep - 04 Oct	Transavia France
25 Sep - 05 Oct	Transavia France
25 Sep - 05 Oct	Turkish Airlines	direct
25 Sep - 04 Oct	Turkish Airlines	direct

Also check the deals for one-way flights from Lisbon to Istanbul in September.

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 Lisbon to Istanbul in September from $187

Return flights