Are there nonstop flights from Riyadh (RUH) to Dubai (DWC)?

Yes. Flynas, flyadeal fly this route. Flight time is about 1h 30m.

Riyadh → Dubai

King Khalid International Airport (RUH) to Al Maktoum International Airport (DWC)・853 km

Nonstop flights available (2 airlines). Flight time about 1h 30m. Nonstop return flights also operate.

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