Are there nonstop flights from Ilam (IIL) to Tehran (THR)?

Yes. Iran Air, Mahan Air, Iran Aseman Airlines, Qeshm Air, Pouya Air fly this route. Flight time is about 1h 6m.

Ilam → Tehran

Ilam Airport (IIL) to Mehrabad International Airport (THR)・506 km

Nonstop flights available (5 airlines). Flight time about 1h 6m. Nonstop return flights also operate.

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