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