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

Return flights

07 May - 28 May	Etihad Airways
05 May - 20 May	Etihad Airways
07 May - 20 May	Etihad Airways
06 May - 20 May	Etihad Airways
06 May - 04 Jun	Turkish Airlines
08 May - 29 May	Etihad Airways
04 May - 19 May	Turkish Airlines
01 May - 28 May	Turkish Airlines
08 May - 18 May	Qatar Airways
01 May - 16 May	Etihad Airways
17 May - 28 May	Turkish Airlines
26 May - 03 Jun	Air Canada
29 May - 15 Jun	Air Canada
29 May - 19 Jun	Air Canada
28 May - 15 Jun	Air Canada
30 May - 19 Jun	Air Canada
28 May - 09 Jun	Turkish Airlines
28 May - 14 Jun	SWISS
29 May - 14 Jun	ITA Airways
23 May - 04 Jun	SWISS

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

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 May from $804

Return flights