| Rocca Priora to Oerlinghausen | 729.46 mi (1,173.95 km) |
| Rocca Priora to Oestrich-Winkel | 611.93 mi (984.81 km) |
| Rocca Priora to Offenburg | 518.16 mi (833.90 km) |
| Rocca Priora to Oftersheim | 561.67 mi (903.91 km) |
| Rocca Priora to Ohrdruf | 632.36 mi (1,017.69 km) |
| Rocca Priora to Ohringen | 536.18 mi (862.90 km) |
| Rocca Priora to Olbernhau | 614.38 mi (988.74 km) |
| Rocca Priora to Olching | 448.95 mi (722.52 km) |
| Rocca Priora to Oldenburg | 812.82 mi (1,308.10 km) |
| Rocca Priora to Oldenburg in Holstein | 869.10 mi (1,398.69 km) |
| Rocca Priora to Olfen | 731.62 mi (1,177.42 km) |
| Rocca Priora to Olpe | 679.50 mi (1,093.55 km) |
| Rocca Priora to Olsberg | 691.29 mi (1,112.53 km) |
| Rocca Priora to Oranienburg | 758.35 mi (1,220.44 km) |
| Rocca Priora to Ortenberg | 618.24 mi (994.96 km) |
