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

Return flights

17 Sep - 05 Oct	Korean Air
22 Sep - 24 Oct	Korean Air
01 Sep - 29 Sep	Korean Air
02 Sep - 24 Sep	Korean Air
06 Sep - 14 Oct	jetBlue
30 Sep - 30 Oct	Korean Air
14 Sep - 27 Sep	Korean Air
04 Sep - 30 Sep	Alaska Airlines
23 Sep - 22 Oct	China Airlines
15 Sep - 17 Oct	China Airlines
21 Sep - 20 Oct	Alaska Airlines
01 Sep - 19 Oct	Alaska 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 $827

Return flights