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

Return flights

19 Apr - 24 Apr	Air Canada
26 Apr - 05 May	Cathay Pacific
07 Apr - 28 Apr	China Airlines
28 Apr - 13 May	Air Canada
08 Apr - 28 Apr	Cathay Pacific
06 Apr - 15 Apr	jetBlue
30 Apr - 04 May	Alaska Airlines
21 Apr - 28 Apr	Cathay Pacific
12 Apr - 17 Apr	Cathay Pacific
25 Apr - 04 May	Air Canada
23 Apr - 23 May	STARLUX Airlines
15 Apr - 13 May	Cathay Pacific
15 Apr - 23 Apr	EVA Air
04 Apr - 16 Apr	Cathay Pacific
23 Apr - 30 Apr	Cathay Pacific
10 Apr - 17 Apr	Air Canada
29 Apr - 13 May	EVA Air
01 Apr - 30 May	EVA Air
29 Apr - 19 May	EVA Air

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 $901

Return flights