AirHint found the following cheapest return flights from Chicago (ORD) to Ho Chi Minh City (SGN) in October 2025 (see full year).

Return flights

01 Oct - 14 Oct	Cathay Pacific
01 Oct - 13 Oct	Cathay Pacific
04 Oct - 25 Oct	Cathay Pacific
11 Oct - 31 Oct	Cathay Pacific
03 Oct - 24 Oct	Cathay Pacific
11 Oct - 01 Nov	Cathay Pacific
18 Oct - 25 Oct	Delta

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

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 Chicago to Ho Chi Minh City in October from 639€

Return flights