Are there nonstop flights from St. John's (YYT) to Tampa (TPA)?

Yes. WestJet fly this route. Flight time is about 4h 28m.

What is the fastest connection from St. John's (YYT) to Tampa (TPA)?

via Halifax ≈ 5h, via Montréal ≈ 5h 22m, via Ottawa ≈ 5h 28m (estimated flying time, excluding layovers).

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

St. John's International Airport (YYT) to Tampa International Airport (TPA)・3,372 km

Nonstop flights available (1 airline). Flight time about 4h 28m. Nonstop return flights also operate.

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

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.