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

Return flights

20 Aug - 12 Sep	Icelandair
13 Aug - 21 Aug	British Airways
25 Aug - 09 Sep	SWISS
19 Aug - 10 Sep	Austrian Airlines
25 Aug - 10 Sep	Air Canada
09 Aug - 18 Aug	British Airways
14 Aug - 11 Sep	Austrian Airlines
18 Aug - 25 Aug	Delta
04 Aug - 25 Aug	Delta
06 Aug - 25 Aug	Delta
29 Aug - 12 Sep	Icelandair
20 Aug - 28 Aug	Icelandair
17 Aug - 24 Aug	Scandinavian Airlines
04 Aug - 13 Aug	Air Canada
25 Aug - 08 Sep	Austrian Airlines
04 Aug - 18 Sep	Icelandair
20 Aug - 11 Sep	TAP
12 Aug - 11 Sep	Austrian Airlines
19 Aug - 26 Aug	Icelandair
19 Aug - 27 Aug	Icelandair

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

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 August from 455€

Return flights