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	Delta
28 Jan - 13 Feb	Delta
26 Jan - 02 Feb	Delta
20 Jan - 03 Feb	Delta
21 Jan - 11 Feb	Delta
12 Jan - 26 Jan	Frontier Airlines
14 Jan - 04 Feb	Delta
18 Jan - 17 Feb	Korean Air
25 Jan - 27 Feb	Delta
15 Jan - 29 Jan	Frontier Airlines
07 Jan - 28 Jan	Frontier Airlines
09 Jan - 22 Jan	Frontier Airlines
16 Jan - 24 Feb	Delta
07 Jan - 12 Jan	Frontier Airlines
16 Jan - 18 Jan	Hawaiian Airlines
07 Jan - 11 Feb	Alaska Airlines
01 Jan - 10 Jan	KLM
01 Jan - 09 Jan	KLM
18 Jan - 25 Jan	British Airways
10 Jan - 25 Jan	British Airways

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 809€

Return flights