Are there nonstop flights from San Juan (SJU) to Shanghai (PVG)?

No. The fastest connection is via New York, about 18h of total flying time.

What is the fastest connection from San Juan (SJU) to Shanghai (PVG)?

via New York ≈ 18h, via Toronto ≈ 18h 4m, via Detroit ≈ 18h 9m (estimated flying time, excluding layovers).

from 47,000 JAL miles (economy, one way, based on the published award charts).

Luis Munoz Marin International Airport (SJU) to Shanghai Pudong International Airport (PVG)・14,439 km

No nonstop flights. The fastest connection is via New York (JFK), about 18h of flying time (layover not included).

With milesJAL 47,000 miles+ (via DFW)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

5 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.