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

Return flights

23 Dec - 30 Dec	EVA Air
23 Dec - 29 Dec	EVA Air
23 Dec - 28 Dec	EVA Air
01 Dec - 07 Dec	China Airlines
24 Dec - 02 Jan	China Airlines
23 Dec - 30 Dec	Cathay Pacific	direct
01 Dec - 07 Dec	Cathay Pacific	direct
23 Dec - 28 Dec	Cathay Pacific	direct
23 Dec - 29 Dec	Cathay Pacific	direct
24 Dec - 02 Jan	United	direct
23 Dec - 03 Jan	Cathay Pacific	direct
22 Dec - 04 Jan	EVA Air
26 Dec - 04 Jan	Delta
25 Dec - 06 Jan	Delta
01 Dec - 08 Dec	Delta
17 Dec - 30 Dec	United
19 Dec - 04 Jan	EVA Air
20 Dec - 03 Jan	United
22 Dec - 04 Jan	Cathay Pacific	direct
19 Dec - 04 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 $701

Return flights