American Airlines has low fares from California to Beijing, China at around $556 round trip from San Francisco SFO airport, $561 from Los Angeles LAX and $608 San Jose SJC, California to Beijing PEK, China.
Travel departure dates are from February through end of April and again from September into mid-December 2016.
American Airlines San Francisco SFO – Dallas DFW – Beijing PEK, China
$555.56 Friday April 1 – Friday April 8, 2016
SFO-DFW-PEK-DFW-SFO = 16,870 flight miles. This is a low 3.3 cents per EQM. AA flight itineraries route through either Dallas DFW or Chicago ORD. SFO to Beijing via Chicago is only 10 fewer miles each way compared to routing through Dallas DFW, so flight schedule is more important than connecting city for these fares.
Delta and United have comparable low prices at about $50 more per round trip ticket.