| Sremska Mitrovica to Octeville | 1,042.54 mi (1,677.80 km) |
| Sremska Mitrovica to Oignies | 858.32 mi (1,381.33 km) |
| Sremska Mitrovica to Oissel | 918.30 mi (1,477.86 km) |
| Sremska Mitrovica to Olivet | 864.95 mi (1,392.00 km) |
| Sremska Mitrovica to Ollioules | 694.25 mi (1,117.29 km) |
| Sremska Mitrovica to Olonne-sur-Mer | 1,033.44 mi (1,663.17 km) |
| Sremska Mitrovica to Oloron-Sainte-Marie | 1,008.34 mi (1,622.76 km) |
| Sremska Mitrovica to Onet Village | 835.79 mi (1,345.08 km) |
| Sremska Mitrovica to Onnaing | 831.41 mi (1,338.02 km) |
| Sremska Mitrovica to Orange | 730.06 mi (1,174.91 km) |
| Sremska Mitrovica to Orchies | 848.10 mi (1,364.88 km) |
| Sremska Mitrovica to Orleans | 864.88 mi (1,391.89 km) |
| Sremska Mitrovica to Orly | 852.17 mi (1,371.44 km) |
| Sremska Mitrovica to Ormesson-sur-Marne | 846.26 mi (1,361.92 km) |
| Sremska Mitrovica to Orsay | 860.75 mi (1,385.24 km) |
