| Nagykallo to Oerlinghausen | 649.48 mi (1,045.24 km) |
| Nagykallo to Oestrich-Winkel | 644.31 mi (1,036.92 km) |
| Nagykallo to Offenburg | 641.59 mi (1,032.55 km) |
| Nagykallo to Oftersheim | 613.62 mi (987.52 km) |
| Nagykallo to Ohrdruf | 539.44 mi (868.14 km) |
| Nagykallo to Ohringen | 571.56 mi (919.84 km) |
| Nagykallo to Olbernhau | 429.04 mi (690.48 km) |
| Nagykallo to Olching | 486.70 mi (783.26 km) |
| Nagykallo to Oldenburg | 699.05 mi (1,125.02 km) |
| Nagykallo to Oldenburg in Holstein | 649.08 mi (1,044.59 km) |
| Nagykallo to Olfen | 695.91 mi (1,119.96 km) |
| Nagykallo to Olpe | 664.55 mi (1,069.49 km) |
| Nagykallo to Olsberg | 643.36 mi (1,035.38 km) |
| Nagykallo to Oranienburg | 506.99 mi (815.91 km) |
| Nagykallo to Ortenberg | 602.40 mi (969.47 km) |
