AirHint found the following cheapest return flights from Seattle (SEA) to Ho Chi Minh City (SGN) in August 2025 (see full year).

Return flights

18 Aug - 08 Sep	Asiana Airlines
18 Aug - 03 Sep	Asiana Airlines
17 Aug - 07 Sep	Asiana Airlines
16 Aug - 09 Sep	Asiana Airlines
18 Aug - 07 Sep	STARLUX Airlines
20 Aug - 27 Aug	Asiana Airlines
30 Aug - 31 Aug	EVA Air

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

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 Seattle to Ho Chi Minh City in August from 583€

Return flights