Are there nonstop flights from Sapporo (CTS) to Nankoku (KCZ)?

No. The fastest connection is via Osaka, about 2h 28m of total flying time.

What is the fastest connection from Sapporo (CTS) to Nankoku (KCZ)?

via Osaka ≈ 2h 28m, via Osaka ≈ 2h 28m, via Nagoya ≈ 2h 32m (estimated flying time, excluding layovers).

from 13,000 ANA miles, from 15,000 JAL miles (economy, one way, based on the published award charts).

New Chitose Airport (CTS) to Kochi Ryoma Airport (KCZ)・1,242 km

No nonstop flights. The fastest connection is via Osaka (ITM), about 2h 28m of flying time (layover not included).

With milesANA 13,000 miles+ (via ITM)JAL 15,000 miles+ (via FUK)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

6 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.