Both destinations are served by Rajkot (RAJ). Since there's no flight route between them, the best way to travel is by road.
Kutch
Fly to Rajkot (RAJ), then travel by road to Kutch. Taxis, buses, and private cabs are available from the airport.
Dhrangadhra
Fly to Rajkot (RAJ), then travel by road to Dhrangadhra. Local transport options include taxis, auto-rickshaws, and state buses.