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

Return flights

04 Dec - 09 Dec	KLM
01 Dec - 08 Dec	KLM
20 Dec - 11 Jan	KLM
07 Dec - 14 Dec	KLM
07 Dec - 15 Dec	KLM
20 Dec - 03 Jan	KLM
01 Dec - 08 Dec	Turkish Airlines	direct
06 Dec - 07 Dec	KLM
04 Dec - 09 Dec	Turkish Airlines	direct
20 Dec - 03 Jan	Turkish Airlines	direct
07 Dec - 15 Dec	Turkish Airlines	direct
07 Dec - 17 Dec	Turkish Airlines
15 Dec - 06 Jan	British Airways
15 Dec - 08 Jan	British Airways
06 Dec - 17 Dec	Turkish Airlines

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.

Book a cheap hotel in Washington

Cheap car rent in Washington

Cheapest return flights from Istanbul to Washington in December from $450

Return flights