| Petrovaradin to Oerlinghausen | 689.38 mi (1,109.45 km) |
| Petrovaradin to Oestrich-Winkel | 641.62 mi (1,032.59 km) |
| Petrovaradin to Offenburg | 605.22 mi (974.01 km) |
| Petrovaradin to Oftersheim | 599.47 mi (964.76 km) |
| Petrovaradin to Ohrdruf | 570.72 mi (918.49 km) |
| Petrovaradin to Ohringen | 557.07 mi (896.52 km) |
| Petrovaradin to Olbernhau | 480.71 mi (773.62 km) |
| Petrovaradin to Olching | 453.01 mi (729.04 km) |
| Petrovaradin to Oldenburg | 756.00 mi (1,216.66 km) |
| Petrovaradin to Oldenburg in Holstein | 741.44 mi (1,193.23 km) |
| Petrovaradin to Olfen | 723.94 mi (1,165.07 km) |
| Petrovaradin to Olpe | 681.76 mi (1,097.19 km) |
| Petrovaradin to Olsberg | 670.56 mi (1,079.16 km) |
| Petrovaradin to Oranienburg | 598.71 mi (963.53 km) |
| Petrovaradin to Ortenberg | 612.38 mi (985.54 km) |
