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

Return flights

26 Dec - 03 Jan	Icelandair
23 Dec - 12 Jan	KLM
24 Dec - 31 Dec	KLM
17 Dec - 31 Dec	KLM
15 Dec - 31 Dec	KLM
15 Dec - 29 Dec	KLM
16 Dec - 29 Dec	Air France
25 Dec - 01 Jan	KLM
18 Dec - 28 Jan	KLM
24 Dec - 31 Dec	Turkish Airlines	direct
25 Dec - 01 Jan	Turkish Airlines	direct
23 Dec - 12 Jan	Turkish Airlines	direct
17 Dec - 31 Dec	Turkish Airlines	direct
21 Dec - 28 Jan	KLM
25 Dec - 05 Jan	Turkish Airlines	direct
15 Dec - 06 Jan	Turkish Airlines	direct
15 Dec - 08 Jan	Turkish Airlines	direct
15 Dec - 31 Dec	Turkish Airlines	direct
08 Dec - 29 Dec	KLM
10 Dec - 14 Dec	Delta

Also check the deals for one-way flights from Istanbul to Washington 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 Istanbul to Washington in December from $527

Return flights