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

Return flights

07 Dec - 19 Dec	Delta
10 Dec - 19 Dec	Delta
03 Dec - 12 Dec	Delta
01 Dec - 10 Dec	Delta
02 Dec - 10 Dec	British Airways
07 Dec - 17 Dec	British Airways
11 Dec - 23 Dec	Delta
25 Dec - 08 Jan	British Airways
27 Dec - 03 Jan	British Airways
19 Dec - 26 Dec	Delta
22 Dec - 05 Jan	British Airways
18 Dec - 04 Jan	British Airways

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 730€

Return flights