AirHint found the following cheapest return flights from Beijing (PEK) to San Francisco (SFO) in September 2025 (see full year).

Return flights

18 Sep - 20 Sep	Cathay Pacific
01 Sep - 15 Sep	Korean Air
24 Sep - 04 Oct	Korean Air
30 Sep - 13 Oct	Air Canada
01 Sep - 15 Sep	United	direct
30 Sep - 11 Oct	Air Canada
29 Sep - 06 Oct	United
24 Sep - 04 Oct	United	direct
29 Sep - 09 Oct	ANA
29 Sep - 07 Oct	Air Canada
26 Sep - 08 Oct	Air Canada
27 Sep - 10 Oct	United
27 Sep - 09 Oct	United
18 Sep - 20 Sep	United	direct

Also check the deals for one-way flights from Beijing to San Francisco in September.

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 Beijing to San Francisco in September from $737

Return flights