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

Return flights

05 Dec - 13 Dec	Icelandair
10 Dec - 17 Dec	Air Canada
09 Dec - 16 Dec	TAP
04 Dec - 13 Dec	KLM
09 Dec - 12 Dec	KLM
30 Dec - 24 Jan	TAP
03 Dec - 27 Dec	Icelandair
24 Dec - 31 Dec	Icelandair
16 Dec - 26 Dec	SWISS
15 Dec - 10 Jan	TAP
24 Dec - 17 Jan	Austrian Airlines
04 Dec - 27 Dec	TAP
23 Dec - 17 Jan	Icelandair
22 Dec - 17 Jan	Icelandair
27 Dec - 31 Dec	Icelandair
17 Dec - 10 Jan	Air Canada
08 Dec - 03 Jan	TAP
18 Dec - 10 Jan	Icelandair
13 Dec - 03 Jan	Icelandair
19 Dec - 10 Jan	Icelandair

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 $662

Return flights