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

Return flights

30 Mar - 15 Apr	Cathay Pacific
29 Mar - 22 Apr	Cathay Pacific
24 Mar - 29 Apr	Air Canada
03 Mar - 17 Mar	Alaska Airlines
02 Mar - 10 Mar	China Airlines
04 Mar - 11 Mar	Air Canada
10 Mar - 17 Mar	Alaska Airlines
23 Mar - 30 Mar	jetBlue
11 Mar - 22 Apr	Cathay Pacific
16 Mar - 25 Mar	Alaska Airlines
09 Mar - 18 Mar	Alaska Airlines
09 Mar - 23 Mar	Alaska Airlines
15 Mar - 24 Mar	Alaska Airlines
09 Mar - 17 Mar	Alaska Airlines
16 Mar - 18 Apr	Frontier Airlines
24 Mar - 16 Apr	EVA Air
16 Mar - 01 Apr	Alaska Airlines
25 Mar - 21 Apr	EVA Air
25 Mar - 27 Apr	EVA Air
25 Mar - 16 Apr	EVA Air

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

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.

Book a cheap hotel in Bangkok

Cheap car rent in Bangkok

Cheapest return flights from Washington to Bangkok in March from $948

Return flights