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

Return flights

13 Dec - 23 Jan	Icelandair
10 Dec - 23 Jan	Icelandair
03 Dec - 12 Dec	Icelandair
03 Dec - 08 Dec	Icelandair
13 Dec - 09 Jan	Icelandair
03 Dec - 19 Dec	Icelandair
24 Dec - 16 Jan	Icelandair
08 Dec - 22 Dec	Air Canada
31 Dec - 20 Jan	Air Canada
01 Dec - 08 Dec	Air Canada
09 Dec - 16 Dec	Austrian Airlines
03 Dec - 15 Dec	Icelandair
02 Dec - 09 Dec	Lufthansa
10 Dec - 20 Jan	Lufthansa
09 Dec - 18 Dec	British Airways
09 Dec - 23 Dec	British Airways
09 Dec - 20 Jan	British Airways
09 Dec - 21 Jan	British Airways
09 Dec - 13 Jan	British Airways
09 Dec - 27 Jan	British Airways

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

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 December from $381

Return flights