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

Return flights

03 Dec - 08 Dec	Icelandair
03 Dec - 12 Dec	Icelandair
10 Dec - 16 Jan	Icelandair
01 Dec - 13 Dec	Air Canada
31 Dec - 12 Jan	Icelandair
10 Dec - 18 Dec	British Airways
09 Dec - 23 Dec	British Airways
30 Dec - 09 Jan	British Airways
31 Dec - 09 Jan	British Airways
03 Dec - 13 Dec	TAP
30 Dec - 14 Jan	FrenchBee
10 Dec - 17 Dec	TAP
13 Dec - 16 Jan	Icelandair
04 Dec - 11 Dec	Delta
05 Dec - 09 Jan	British Airways
30 Dec - 24 Jan	FrenchBee
31 Dec - 24 Jan	Lufthansa
11 Dec - 17 Dec	SWISS
10 Dec - 14 Dec	FrenchBee
29 Dec - 12 Jan	Air Canada

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 353€

Return flights