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

Return flights

07 Sep - 28 Sep	Korean Air
02 Sep - 23 Sep	Korean Air
08 Sep - 29 Sep	Korean Air
10 Sep - 24 Sep	Korean Air
09 Sep - 23 Sep	Korean Air
16 Sep - 25 Sep	Korean Air
09 Sep - 16 Sep	Korean Air
16 Sep - 13 Oct	Korean Air
16 Sep - 07 Oct	Korean Air
09 Sep - 14 Oct	Korean Air
04 Sep - 07 Sep	Korean Air
08 Sep - 30 Sep	Korean Air
07 Sep - 14 Sep	Korean Air
09 Sep - 06 Oct	Korean Air
21 Sep - 16 Oct	Korean Air
08 Sep - 01 Oct	Korean Air
04 Sep - 02 Oct	Korean Air
04 Sep - 05 Oct	Korean Air
25 Sep - 12 Oct	China Airlines
27 Sep - 12 Oct	China Airlines

Also check the deals for one-way flights from Ontario 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 Ontario to Ho Chi Minh City in September from $708

Return flights