Are there nonstop flights from St. Petersburg–Clearwater (PIE) to Niagara Falls (IAG)?

Yes. Allegiant Air fly this route. Flight time is about 2h 32m.

St. Petersburg–Clearwater → Niagara Falls

St. Petersburg Clearwater International Airport (PIE) to Niagara Falls International Airport (IAG)・1,723 km

Nonstop flights available (1 airline). Flight time about 2h 32m. Nonstop return flights also operate.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.