| Sliema to Octeville | 1,247.07 mi (2,006.97 km) |
| Sliema to Oignies | 1,157.88 mi (1,863.43 km) |
| Sliema to Oissel | 1,147.78 mi (1,847.18 km) |
| Sliema to Olivet | 1,047.00 mi (1,684.99 km) |
| Sliema to Ollioules | 679.12 mi (1,092.94 km) |
| Sliema to Olonne-sur-Mer | 1,115.99 mi (1,796.02 km) |
| Sliema to Oloron-Sainte-Marie | 947.10 mi (1,524.21 km) |
| Sliema to Onet Village | 856.79 mi (1,378.88 km) |
| Sliema to Onnaing | 1,138.54 mi (1,832.30 km) |
| Sliema to Orange | 764.50 mi (1,230.35 km) |
| Sliema to Orchies | 1,152.07 mi (1,854.08 km) |
| Sliema to Orleans | 1,048.71 mi (1,687.73 km) |
| Sliema to Orly | 1,078.21 mi (1,735.20 km) |
| Sliema to Ormesson-sur-Marne | 1,076.29 mi (1,732.12 km) |
| Sliema to Orsay | 1,081.71 mi (1,740.85 km) |
