AirHint found the following cheapest return flights from Washington (DCA) to Bangkok (BKK) in October 2025 (see full year).

Return flights

28 Oct - 16 Nov	Frontier Airlines
28 Oct - 11 Nov	jetBlue
14 Oct - 28 Oct	Delta
22 Oct - 10 Nov	Delta
18 Oct - 22 Oct	Air Canada
16 Oct - 23 Oct	Delta
28 Oct - 06 Nov	Delta
20 Oct - 28 Oct	Alaska Airlines
06 Oct - 22 Oct	Alaska Airlines
14 Oct - 27 Oct	Alaska Airlines
23 Oct - 09 Nov	Delta
18 Oct - 21 Oct	Alaska Airlines
18 Oct - 08 Nov	Delta
31 Oct - 13 Nov	China Airlines
03 Oct - 07 Oct	Alaska Airlines
03 Oct - 21 Oct	Alaska Airlines
04 Oct - 23 Oct	Alaska Airlines
30 Oct - 13 Nov	Alaska Airlines
19 Oct - 03 Nov	Cathay Pacific
24 Oct - 09 Nov	Cathay Pacific

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

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 October from $947

Return flights