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

Return flights

12 Jan - 25 Jan	ANA
08 Jan - 24 Jan	Delta
12 Jan - 18 Jan	British Airways
21 Jan - 25 Feb	British Airways
11 Jan - 18 Jan	British Airways
11 Jan - 26 Jan	British Airways
05 Jan - 18 Jan	British Airways
09 Jan - 01 Feb	British Airways
15 Jan - 01 Feb	British Airways
08 Jan - 01 Feb	British Airways
18 Jan - 15 Feb	British Airways
08 Jan - 15 Feb	British Airways
10 Jan - 07 Feb	British Airways
05 Jan - 01 Feb	British Airways
05 Jan - 15 Feb	British Airways
21 Jan - 24 Feb	Emirates

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 813€

Return flights