Are there nonstop flights from Sakon Nakhon Airport (SNO) to Bangkok (DMK)?

Yes. Thai AirAsia, Nok Air fly this route. Flight time is about 1h 7m.

Sakon Nakhon Airport → Bangkok

Sakon Nakhon Airport (SNO) to Don Mueang International Airport (DMK)・524 km

Nonstop flights available (2 airlines). Flight time about 1h 7m. Nonstop return flights also operate.

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