| Sremska Mitrovica to Opwijk | 822.95 mi (1,324.41 km) |
| Sremska Mitrovica to Ostend | 880.38 mi (1,416.83 km) |
| Sremska Mitrovica to Oud-Heverlee | 799.96 mi (1,287.41 km) |
| Sremska Mitrovica to Oud-Turnhout | 802.26 mi (1,291.11 km) |
| Sremska Mitrovica to Oudenaarde | 843.07 mi (1,356.80 km) |
| Sremska Mitrovica to Oudenburg | 876.02 mi (1,409.82 km) |
| Sremska Mitrovica to Oupeye | 757.71 mi (1,219.42 km) |
| Sremska Mitrovica to Overijse | 803.84 mi (1,293.66 km) |
| Sremska Mitrovica to Overpelt | 782.46 mi (1,259.24 km) |
| Sremska Mitrovica to Paal | 786.24 mi (1,265.33 km) |
| Sremska Mitrovica to Peer | 778.34 mi (1,252.62 km) |
| Sremska Mitrovica to Pepinster | 746.59 mi (1,201.51 km) |
| Sremska Mitrovica to Peruwelz | 835.18 mi (1,344.10 km) |
| Sremska Mitrovica to Perwez | 788.10 mi (1,268.33 km) |
| Sremska Mitrovica to Philippeville | 787.53 mi (1,267.41 km) |
