Operators
- Independent State of Croatia
- Zrakoplovstvo Nezavisne Države Hrvatske operated seven captured ex-Yugoslav aircraft.
- Hungary
- Royal Hungarian Air Force ordered 36 examples in 1938, but returned the surviving 33 in 1940 after being unhappy with type's performance.
- Italy
- Regia Aeronautica
- Norway
- Norwegian Army Air Service operated four Ca.310s. Serial: 501 503 505 and 507
- Peru
- Cuerpo de Aviación del Perú purchased 16 aircraft in 1938. 15 of them were delivered by ship in May 1938, and the last one was lost during the ferry flight from Italy to Peru on August 2, 1939, killing Cap. Pedro Canga Rodríguez and one of his crew members.
- Spain
- Spanish Air Force
- Yugoslavia
- Royal Yugoslav Air Force purchased 12 aircraft in 1938.
- Yugoslavia
- SFR Yugoslav Air Force - Postwar.
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