| Sremski Karlovci to Opwijk | 826.62 mi (1,330.32 km) |
| Sremski Karlovci to Ostend | 884.18 mi (1,422.94 km) |
| Sremski Karlovci to Oud-Heverlee | 803.63 mi (1,293.32 km) |
| Sremski Karlovci to Oud-Turnhout | 804.93 mi (1,295.41 km) |
| Sremski Karlovci to Oudenaarde | 847.20 mi (1,363.44 km) |
| Sremski Karlovci to Oudenburg | 879.85 mi (1,415.99 km) |
| Sremski Karlovci to Oupeye | 761.10 mi (1,224.88 km) |
| Sremski Karlovci to Overijse | 807.67 mi (1,299.81 km) |
| Sremski Karlovci to Overpelt | 785.06 mi (1,263.44 km) |
| Sremski Karlovci to Paal | 789.29 mi (1,270.24 km) |
| Sremski Karlovci to Peer | 781.07 mi (1,257.02 km) |
| Sremski Karlovci to Pepinster | 750.14 mi (1,207.24 km) |
| Sremski Karlovci to Peruwelz | 839.88 mi (1,351.66 km) |
| Sremski Karlovci to Perwez | 792.07 mi (1,274.71 km) |
| Sremski Karlovci to Philippeville | 792.38 mi (1,275.21 km) |
