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