AirHint found the following cheapest return flights from Washington (DCA) to Bangkok (BKK) in January 2026 (see full year).

Return flights

29 Jan - 09 Feb	Korean Air
26 Jan - 09 Feb	Korean Air
19 Jan - 02 Feb	Korean Air
20 Jan - 30 Jan	Frontier Airlines
13 Jan - 27 Jan	Frontier Airlines
27 Jan - 09 Feb	Korean Air
28 Jan - 13 Feb	Frontier Airlines
19 Jan - 28 Jan	ANA
28 Jan - 11 Feb	Korean Air
18 Jan - 04 Feb	Frontier Airlines
19 Jan - 29 Jan	Korean Air
12 Jan - 22 Jan	Alaska Airlines
26 Jan - 05 Feb	Alaska Airlines
18 Jan - 06 Feb	Frontier Airlines
26 Jan - 03 Feb	Korean Air
20 Jan - 26 Jan	Alaska Airlines
09 Jan - 27 Jan	Frontier Airlines
12 Jan - 26 Jan	Frontier Airlines
24 Jan - 28 Jan	Delta
23 Jan - 30 Jan	Korean Air

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

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 Bangkok in January from $891

Return flights