AirHint found the following cheapest return flights from Raleigh-durham (RDU) to Istanbul (IST) in December 2025 (see full year).

Return flights

08 Dec - 14 Dec	Icelandair
08 Dec - 12 Dec	Frontier Airlines
25 Dec - 29 Dec	Delta
15 Dec - 19 Dec	Frontier Airlines
25 Dec - 08 Jan	Frontier Airlines
13 Dec - 21 Dec	Frontier Airlines
20 Dec - 24 Dec	Frontier Airlines
15 Dec - 26 Dec	KLM
14 Dec - 24 Dec	KLM
16 Dec - 20 Dec	Frontier Airlines
23 Dec - 27 Dec	KLM
20 Dec - 06 Jan	Frontier Airlines
22 Dec - 01 Jan	KLM

Also check the deals for one-way flights from Raleigh-durham 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 Raleigh-durham to Istanbul in December from 814€

Return flights