AirHint found the following cheapest return flights from Valencia (VLC) to Istanbul (IST) in September 2025 (see full year).

Return flights

30 Sep - 08 Oct	Wizz Air Malta
25 Sep - 03 Oct	Wizz Air Malta
18 Sep - 23 Sep	Ryanair
18 Sep - 30 Sep	Ryanair
17 Sep - 23 Sep	Air Europa
27 Sep - 02 Oct	Wizz Air Malta
07 Sep - 16 Sep	Ryanair
24 Sep - 17 Oct	Ryanair
15 Sep - 28 Sep	Air Europa
08 Sep - 16 Sep	Ryanair
07 Sep - 15 Sep	Eurowings
24 Sep - 29 Sep	Wizz Air Malta
17 Sep - 19 Sep	Vueling Airlines
25 Sep - 29 Sep	Ryanair
26 Sep - 04 Oct	Ryanair
26 Sep - 04 Oct	Turkish Airlines	direct
24 Sep - 17 Oct	Turkish Airlines	direct
27 Sep - 02 Oct	Turkish Airlines	direct
29 Sep - 02 Oct	Turkish Airlines	direct

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

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Cheapest return flights from Valencia to Istanbul in September from 136€

Return flights