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

Return flights

10 Dec - 15 Dec	Air Canada
06 Dec - 12 Dec	KLM
06 Dec - 13 Dec	KLM
02 Dec - 12 Jan	KLM
11 Dec - 18 Dec	Air Canada
12 Dec - 25 Dec	jetBlue
01 Dec - 05 Dec	KLM
29 Dec - 12 Jan	British Airways
06 Dec - 19 Dec	Air Canada
23 Dec - 17 Jan	jetBlue
31 Dec - 09 Jan	Air Canada
15 Dec - 25 Dec	jetBlue
06 Dec - 18 Dec	British Airways
11 Dec - 19 Dec	British Airways
24 Dec - 12 Jan	jetBlue
26 Dec - 17 Jan	Air Canada
24 Dec - 10 Jan	Air Canada
13 Dec - 08 Jan	jetBlue
28 Dec - 17 Jan	British Airways
16 Dec - 08 Jan	jetBlue

Also check the deals for one-way flights from Washington 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 Washington to Istanbul in December from $622

Return flights