AirHint found the following cheapest return flights from Washington (DCA) to Ho Chi Minh City (SGN) in September 2025 (see full year).

Return flights

16 Sep - 14 Oct	jetBlue
04 Sep - 11 Sep	jetBlue
03 Sep - 24 Sep	China Airlines
29 Sep - 31 Oct	jetBlue
30 Sep - 31 Oct	Alaska Airlines
23 Sep - 14 Oct	Alaska Airlines
02 Sep - 24 Sep	China Airlines
15 Sep - 22 Sep	China Airlines
16 Sep - 22 Sep	China Airlines
02 Sep - 10 Sep	China Airlines
02 Sep - 30 Sep	China Airlines
06 Sep - 14 Oct	China Airlines
15 Sep - 17 Oct	China Airlines
22 Sep - 24 Oct	China Airlines
08 Sep - 03 Oct	China Airlines
08 Sep - 15 Sep	China Airlines
30 Sep - 21 Oct	China Airlines
10 Sep - 24 Sep	China Airlines
12 Sep - 26 Sep	China Airlines
10 Sep - 08 Oct	China Airlines

Also check the deals for one-way flights from Washington to Ho Chi Minh City in September.

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 Ho Chi Minh City in September from $896

Return flights