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

Return flights

20 Jan - 26 Jan	Frontier Airlines
28 Jan - 17 Feb	Delta
21 Jan - 25 Feb	Delta
21 Jan - 26 Feb	Delta
14 Jan - 21 Jan	Delta
09 Jan - 22 Jan	Delta
24 Jan - 31 Jan	Delta
25 Jan - 06 Feb	Delta
18 Jan - 22 Jan	Delta
16 Jan - 24 Jan	jetBlue
09 Jan - 17 Jan	jetBlue
13 Jan - 19 Jan	Delta
01 Jan - 14 Jan	Alaska Airlines
15 Jan - 25 Jan	British Airways
09 Jan - 09 Feb	British Airways
14 Jan - 04 Feb	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 831€

Return flights