Are there nonstop flights from Toronto (YYZ) to Christiansted (STX)?

No. The fastest connection is via San Juan, about 4h 49m of total flying time.

What is the fastest connection from Toronto (YYZ) to Christiansted (STX)?

via San Juan ≈ 4h 49m, via Charlotte ≈ 5h 5m, via Miami ≈ 5h 29m (estimated flying time, excluding layovers).

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

Toronto Pearson International Airport (YYZ) to Henry E. Rohlsen Airport (STX)・3,206 km

No nonstop flights. The fastest connection is via San Juan (SJU), about 4h 49m of flying time (layover not included).

With milesJAL 23,000 miles+ (via CLT)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.