AirHint found the following cheapest return flights from Newark (EWR) to Istanbul (IST) in October 2025 (see full year).

Return flights

01 Oct - 06 Oct	Icelandair
11 Oct - 17 Oct	Icelandair
08 Oct - 17 Oct	Icelandair
28 Oct - 04 Nov	British Airways
13 Oct - 20 Oct	SWISS
31 Oct - 14 Nov	Delta
10 Oct - 15 Oct	Icelandair
06 Oct - 15 Oct	SWISS
02 Oct - 16 Oct	Icelandair
01 Oct - 10 Oct	Icelandair
02 Oct - 06 Oct	Icelandair
07 Oct - 17 Oct	Austrian Airlines
21 Oct - 03 Nov	Austrian Airlines
19 Oct - 01 Nov	Delta
28 Oct - 04 Nov	Turkish Airlines	direct
22 Oct - 02 Nov	Lufthansa
31 Oct - 14 Nov	Turkish Airlines	direct
19 Oct - 01 Nov	Turkish Airlines	direct
22 Oct - 02 Nov	Turkish Airlines	direct

Also check the deals for one-way flights from Newark to Istanbul in October.

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 Newark to Istanbul in October from 394€

Return flights