Our plane - the Ju 52 details care of Wikpedia:
Specifications (Junkers Ju 52/3m g7e)
Data from Jane’s Fighting Aircraft of World War II[1]

General characteristics
Crew: 3 (two pilots, radio operator)
Capacity: 18 troops or 12 litter patients
Length: 18.90 m (62 ft 0 in)
Wingspan: 29.25 m (95 ft 10 in)
Height: 4.5 m (14 ft 10 in)
Wing area: 110.5 m² (1,190 ft²)
Empty weight: 6,510 kg (14,325 lb)
Loaded weight: 9,200 kg (20,270 lb)
Max takeoff weight: 10,990 kg (24,200 lb)
Powerplant: 3× BMW 132T radial engines, 533 kW (715 hp)[1] each
Performance
Maximum speed: 265 km/h (165 mph) at sea level
Cruise speed: 211 km/h (132 mph)
Range: 870 km (540 miles)
Service ceiling: 5,490 m (18,000 ft)
Rate of climb: 17 minutes to 3,050 m (10,000 ft)
Armament
1× 13 mm MG 131 machine gun in a dorsal position
2× 7.92 mm MG 15 machine guns

I have seen a couple of different ranges quoted - up to 650 nautical miles/ 1200 km, but allowing for full loading and combat conditions, we can assume that we can transport paras up to about 250 miles away quite safely - except for the fighters!!!