Are there nonstop flights from Dublin (DUB) to Cardiff (CWL)?

Yes. Ryanair fly this route. Flight time is about 51m.

Dublin → Cardiff

Dublin Airport (DUB) to Cardiff International Airport (CWL)・300 km

Nonstop flights available (1 airline). Flight time about 51m. Nonstop return flights also operate.

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