| Monreale to Octeville | 1,086.84 mi (1,749.10 km) |
| Monreale to Oignies | 993.83 mi (1,599.42 km) |
| Monreale to Oissel | 985.51 mi (1,586.03 km) |
| Monreale to Olivet | 885.93 mi (1,425.76 km) |
| Monreale to Ollioules | 523.53 mi (842.54 km) |
| Monreale to Olonne-sur-Mer | 963.43 mi (1,550.50 km) |
| Monreale to Oloron-Sainte-Marie | 808.29 mi (1,300.82 km) |
| Monreale to Onet Village | 704.29 mi (1,133.44 km) |
| Monreale to Onnaing | 974.39 mi (1,568.12 km) |
| Monreale to Orange | 607.63 mi (977.88 km) |
| Monreale to Orchies | 987.97 mi (1,589.98 km) |
| Monreale to Orleans | 887.56 mi (1,428.39 km) |
| Monreale to Orly | 915.52 mi (1,473.39 km) |
| Monreale to Ormesson-sur-Marne | 913.45 mi (1,470.06 km) |
| Monreale to Orsay | 919.24 mi (1,479.38 km) |
