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

Return flights

07 Jan - 28 Jan	Etihad Airways
06 Jan - 03 Feb	Etihad Airways
28 Jan - 09 Feb	Etihad Airways
25 Jan - 02 Feb	Qatar Airways
21 Jan - 24 Feb	Qatar Airways
26 Jan - 03 Feb	Qatar Airways
19 Jan - 28 Jan	Qatar Airways
28 Jan - 13 Feb	Qatar Airways
07 Jan - 04 Feb	Etihad Airways
07 Jan - 10 Feb	Etihad Airways
29 Jan - 09 Feb	Etihad Airways
27 Jan - 09 Feb	Etihad Airways
20 Jan - 26 Jan	Etihad Airways
13 Jan - 28 Jan	Etihad Airways
16 Jan - 26 Jan	Etihad Airways
19 Jan - 29 Jan	Korean Air
14 Jan - 27 Jan	Qatar Airways
12 Jan - 27 Jan	ANA
12 Jan - 25 Jan	ANA
13 Jan - 22 Jan	Air China

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 $829

Return flights