AirHint found the following cheapest return flights from Hong Kong (HKG) to San Francisco (SFO) in December 2025 (see full year).

Return flights

05 Dec - 12 Dec	Air Canada
24 Dec - 04 Jan	China Airlines
24 Dec - 03 Jan	China Airlines
22 Dec - 06 Jan	EVA Air
24 Dec - 04 Jan	Cathay Pacific	direct
24 Dec - 03 Jan	Cathay Pacific	direct
23 Dec - 29 Dec	United
05 Dec - 12 Dec	Cathay Pacific	direct
19 Dec - 03 Jan	China Airlines
13 Dec - 27 Dec	China Airlines
20 Dec - 28 Dec	United
17 Dec - 23 Dec	China Airlines
20 Dec - 26 Dec	EVA Air
10 Dec - 21 Dec	Air Canada
08 Dec - 25 Dec	Cathay Pacific	direct
08 Dec - 17 Dec	Cathay Pacific	direct
22 Dec - 06 Jan	Cathay Pacific	direct
19 Dec - 03 Jan	Cathay Pacific	direct

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

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 December from 604€

Return flights