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

Return flights

21 Sep - 19 Oct	Frontier Airlines
02 Sep - 09 Sep	Spirit Airlines
11 Sep - 16 Oct	Frontier Airlines
23 Sep - 28 Oct	Spirit Airlines
17 Sep - 27 Oct	Spirit Airlines
15 Sep - 27 Oct	Spirit Airlines
03 Sep - 24 Sep	Spirit Airlines
08 Sep - 30 Sep	United
01 Sep - 30 Sep	United
09 Sep - 21 Oct	United
10 Sep - 14 Oct	United
01 Sep - 23 Sep	ANA
15 Sep - 20 Oct	Frontier Airlines
04 Sep - 17 Sep	ANA
11 Sep - 23 Oct	United
04 Sep - 20 Sep	ANA
12 Sep - 16 Sep	United
06 Sep - 13 Sep	Alaska Airlines

Also check the deals for one-way flights from Houston 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 Houston to Ho Chi Minh City in September from $853

Return flights