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

Return flights

23 Apr - 04 May	Etihad Airways
21 Apr - 12 May	Etihad Airways
01 Apr - 01 May	Etihad Airways
01 Apr - 28 Apr	Etihad Airways
09 Apr - 30 Apr	Etihad Airways
05 Apr - 21 Apr	Qatar Airways
22 Apr - 29 Apr	Qatar Airways
24 Apr - 01 May	Qatar Airways
03 Apr - 11 Apr	Etihad Airways
03 Apr - 21 Apr	Turkish Airlines
09 Apr - 16 Apr	Korean Air
04 Apr - 21 Apr	Korean Air
13 Apr - 17 Apr	Turkish Airlines
11 Apr - 19 Apr	Etihad Airways

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

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 April from $819

Return flights