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

Return flights

22 Sep - 28 Oct	Turkish Airlines
22 Sep - 01 Oct	Turkish Airlines
22 Sep - 27 Oct	Turkish Airlines
23 Sep - 07 Oct	Turkish Airlines
22 Sep - 28 Sep	ANA
17 Sep - 05 Oct	Delta
17 Sep - 01 Oct	Delta
21 Sep - 28 Sep	Delta
21 Sep - 27 Oct	Delta
22 Sep - 30 Sep	Etihad Airways
20 Sep - 27 Sep	Alaska Airlines
23 Sep - 21 Oct	Etihad Airways
23 Sep - 27 Oct	ANA
30 Sep - 21 Oct	Turkish Airlines
19 Sep - 26 Sep	Delta
24 Sep - 28 Sep	ANA
19 Sep - 23 Sep	Delta
26 Sep - 28 Sep	ANA

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 697€

Return flights