AirHint found the following cheapest return flights from Hong Kong (HKG) to San Francisco (SFO) in May 2026 (see full year).

Return flights

09 May - 22 May	China Airlines
03 May - 10 May	China Airlines
03 May - 13 May	China Airlines
14 May - 17 May	China Airlines
01 May - 29 May	China Airlines
30 May - 21 Jun	China Airlines
30 May - 22 Jun	China Airlines
03 May - 10 May	United	direct
14 May - 17 May	Cathay Pacific	direct
03 May - 13 May	Cathay Pacific	direct
30 May - 21 Jun	Cathay Pacific	direct
30 May - 22 Jun	Cathay Pacific	direct
01 May - 29 May	Cathay Pacific	direct
01 May - 31 May	Air Canada

Also check the deals for one-way flights from Hong Kong to San Francisco in May.

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 Hong Kong to San Francisco in May from 522€

Return flights