Are there nonstop flights from Phuket (HKT) to Sapporo (CTS)?

No. The fastest connection is via Shanghai, about 7h 43m of total flying time.

What is the fastest connection from Phuket (HKT) to Sapporo (CTS)?

via Shanghai ≈ 7h 43m, via Hong Kong ≈ 7h 44m, via Seoul ≈ 7h 45m (estimated flying time, excluding layovers).

from 19,000 ANA miles, from 23,000 JAL miles (economy, one way, based on the published award charts).

Phuket International Airport (HKT) to New Chitose Airport (CTS)・5,714 km

No nonstop flights. The fastest connection is via Shanghai (PVG), about 7h 43m of flying time (layover not included).

With milesANA 19,000 miles+ (via ICN)JAL 23,000 miles+ (via PVG)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

9 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.