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

Return flights

22 Apr - 29 Apr	Etihad Airways
09 Apr - 22 Apr	Etihad Airways
09 Apr - 17 Apr	Etihad Airways
15 Apr - 23 Apr	Etihad Airways
01 Apr - 14 Apr	Etihad Airways
09 Apr - 20 Apr	Etihad Airways
15 Apr - 13 May	Etihad Airways
07 Apr - 05 May	Etihad Airways
19 Apr - 04 May	Etihad Airways
22 Apr - 30 Apr	Etihad Airways
22 Apr - 05 May	Etihad Airways
23 Apr - 23 May	Etihad Airways
01 Apr - 18 Apr	Etihad Airways
11 Apr - 26 Apr	Etihad Airways
11 Apr - 25 Apr	Etihad Airways
25 Apr - 02 May	Etihad Airways
30 Apr - 04 May	Emirates

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 727€

Return flights