Cheapest return flights from Washington to Istanbul in December from $565

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

Return flights

06 Dec - 12 Dec Icelandair
31 Dec - 24 Jan KLM
06 Dec - 11 Dec Icelandair
02 Dec - 17 Dec Air Canada
01 Dec - 08 Dec Icelandair
01 Dec - 15 Dec Air Canada
02 Dec - 18 Dec Air Canada
05 Dec - 11 Dec Icelandair
09 Dec - 14 Dec Icelandair
29 Dec - 21 Jan KLM
02 Dec - 18 Jan TAP
03 Dec - 13 Dec Air Canada
09 Dec - 16 Dec Icelandair
30 Dec - 23 Jan Icelandair
30 Dec - 24 Jan Air France
30 Dec - 23 Jan Turkish Airlines direct
30 Dec - 29 Jan Turkish Airlines direct
30 Dec - 13 Jan Icelandair
13 Dec - 19 Jan KLM
28 Dec - 17 Jan Lufthansa

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

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