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	Singapore Airlines
17 Aug - 29 Aug	Asiana Airlines
27 Aug - 14 Sep	Asiana Airlines
31 Aug - 15 Sep	Asiana Airlines
04 Aug - 11 Aug	Asiana Airlines
04 Aug - 10 Aug	Asiana Airlines
03 Aug - 10 Aug	Asiana Airlines
07 Aug - 22 Aug	China Eastern
15 Aug - 28 Sep	Asiana Airlines
16 Aug - 23 Aug	Asiana Airlines
06 Aug - 15 Aug	Korean Air

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.

Book a cheap hotel in Hanoi

Cheap car rent in Hanoi

Cheapest return flights from San Francisco to Hanoi in August from $649

Return flights