AirHint found the following cheapest return flights from San Francisco (SFO) to Hanoi (HAN) in August 2025 (see full year).

Return flights

27 Aug - 29 Sep	Asiana Airlines
14 Aug - 20 Aug	Korean Air
20 Aug - 24 Aug	Asiana Airlines
16 Aug - 23 Aug	Asiana Airlines
15 Aug - 28 Sep	Cathay Pacific
03 Aug - 10 Aug	United
17 Aug - 31 Aug	Alaska Airlines

Also check the deals for one-way flights from San Francisco to Hanoi 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 San Francisco to Hanoi in August from 590€

Return flights