AirHint found the following cheapest return flights from Washington (DCA) to Bangkok (BKK) in December 2025 (see full year).

Return flights

04 Dec - 29 Dec	jetBlue
12 Dec - 15 Dec	jetBlue
25 Dec - 09 Jan	jetBlue
16 Dec - 25 Dec	Air Canada
14 Dec - 23 Dec	Air Canada
30 Dec - 06 Jan	ANA
15 Dec - 08 Jan	jetBlue
11 Dec - 08 Jan	jetBlue
14 Dec - 10 Jan	jetBlue
14 Dec - 09 Jan	jetBlue
14 Dec - 08 Jan	jetBlue
14 Dec - 07 Jan	jetBlue
14 Dec - 06 Jan	jetBlue
19 Dec - 08 Jan	jetBlue
18 Dec - 20 Dec	jetBlue

Also check the deals for one-way flights from Washington to Bangkok 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 Bangkok

Cheap car rent in Bangkok

Cheapest return flights from Washington to Bangkok in December from $920

Return flights