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