Are there nonstop flights from Sapporo (CTS) to Shenzhen (SZX)?

No. The fastest connection is via Shanghai, about 5h 1m of total flying time.

What is the fastest connection from Sapporo (CTS) to Shenzhen (SZX)?

via Shanghai ≈ 5h 1m, via Seoul ≈ 5h 4m, via Taipei ≈ 5h 8m (estimated flying time, excluding layovers).

from 8,500 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

New Chitose Airport (CTS) to Shenzhen Bao'an International Airport (SZX)・3,409 km

No nonstop flights. The fastest connection is via Shanghai (PVG), about 5h 1m of flying time (layover not included).

With milesANA 8,500 miles+ (via HND)JAL 23,000 miles+ (via PVG)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

12 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.