| Montalegre to Octeville | 614.88 mi (989.55 km) |
| Montalegre to Oignies | 787.95 mi (1,268.08 km) |
| Montalegre to Oissel | 673.14 mi (1,083.32 km) |
| Montalegre to Olivet | 631.32 mi (1,016.01 km) |
| Montalegre to Ollioules | 700.10 mi (1,126.70 km) |
| Montalegre to Olonne-sur-Mer | 441.31 mi (710.22 km) |
| Montalegre to Oloron-Sainte-Marie | 377.89 mi (608.15 km) |
| Montalegre to Onet Village | 552.18 mi (888.64 km) |
| Montalegre to Onnaing | 803.14 mi (1,292.52 km) |
| Montalegre to Orange | 656.02 mi (1,055.76 km) |
| Montalegre to Orchies | 796.04 mi (1,281.10 km) |
| Montalegre to Orleans | 633.26 mi (1,019.14 km) |
| Montalegre to Orly | 687.21 mi (1,105.95 km) |
| Montalegre to Ormesson-sur-Marne | 694.14 mi (1,117.11 km) |
| Montalegre to Orsay | 678.04 mi (1,091.19 km) |
