Are there nonstop flights from Helsinki (HEL) to Sapporo (CTS)?

No. The fastest connection is via Seoul, about 10h 56m of total flying time.

What is the fastest connection from Helsinki (HEL) to Sapporo (CTS)?

via Seoul ≈ 10h 56m, via Tokyo ≈ 11h 9m, via Tokyo ≈ 11h 10m (estimated flying time, excluding layovers).

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

Helsinki Vantaa Airport (HEL) to New Chitose Airport (CTS)・7,200 km

No nonstop flights. The fastest connection is via Seoul (ICN), about 10h 56m of flying time (layover not included).

With milesJAL 23,000 miles+ (via HND)Economy, one way, estimate. Tap a connection for miles by cabin.

None.

8 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.