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

Return flights

03 Dec - 10 Dec	Turkish Airlines
07 Dec - 21 Jan	Turkish Airlines
06 Dec - 13 Dec	Turkish Airlines
06 Dec - 20 Dec	Turkish Airlines
13 Dec - 01 Jan	Turkish Airlines
24 Dec - 07 Jan	Qatar Airways
21 Dec - 07 Jan	Turkish Airlines
21 Dec - 09 Jan	Frontier Airlines
20 Dec - 02 Jan	jetBlue
19 Dec - 01 Jan	jetBlue
19 Dec - 02 Jan	jetBlue

Also check the deals for one-way flights from Washington to Kuala Lumpur 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 Kuala Lumpur in December from $940

Return flights