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

Return flights

10 Sep - 24 Sep	Cathay Pacific
02 Sep - 14 Sep	Cathay Pacific
01 Sep - 24 Sep	Cathay Pacific
17 Sep - 14 Oct	Cathay Pacific
17 Sep - 14 Oct	United	direct
01 Sep - 30 Sep	Korean Air
16 Sep - 30 Sep	Korean Air
02 Sep - 14 Sep	United	direct
10 Sep - 24 Sep	Air China	direct
01 Sep - 24 Sep	United	direct

Also check the deals for one-way flights from San Francisco to Beijing 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 San Francisco to Beijing in September from 598€

Return flights