Are there nonstop flights from Ramsar (RZR) to Tehran (THR)?

Yes. Iran Air, Iran Aseman Airlines fly this route. Flight time is about 40m.

Ramsar → Tehran

Ramsar Airport (RZR) to Mehrabad International Airport (THR)・147 km

Nonstop flights available (2 airlines). Flight time about 40m. Nonstop return flights also operate.

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