Are there nonstop flights from Ardabil (ADU) to Tehran (THR)?

Yes. Iran Air, Mahan Air, Iran Aseman Airlines, ATA Airlines (Iran), Pouya Air, Zagros Airlines fly this route. Flight time is about 58m.

Ardabil → Tehran

Ardabil Airport (ADU) to Mehrabad International Airport (THR)・390 km

Nonstop flights available (6 airlines). Flight time about 58m. Nonstop return flights also operate.

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