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

Return flights

03 Oct - 16 Oct	FrenchBee
02 Oct - 16 Oct	TAP
01 Oct - 08 Oct	Scandinavian Airlines
27 Oct - 05 Nov	British Airways
27 Oct - 11 Nov	British Airways
29 Oct - 11 Nov	British Airways
29 Oct - 01 Nov	Icelandair
25 Oct - 01 Nov	Icelandair
14 Oct - 21 Oct	TAP
07 Oct - 15 Oct	Austrian Airlines
04 Oct - 12 Oct	FrenchBee
07 Oct - 21 Oct	Icelandair
03 Oct - 06 Oct	FrenchBee
26 Oct - 08 Nov	SWISS
27 Oct - 10 Nov	SWISS
10 Oct - 15 Oct	Icelandair
01 Oct - 08 Oct	Turkish Airlines	direct
30 Oct - 07 Nov	British Airways
24 Oct - 05 Nov	British Airways
27 Oct - 05 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 445€

Return flights