| Monserrato to Octeville | 891.14 mi (1,434.15 km) |
| Monserrato to Oignies | 831.03 mi (1,337.41 km) |
| Monserrato to Oissel | 802.07 mi (1,290.80 km) |
| Monserrato to Olivet | 696.40 mi (1,120.75 km) |
| Monserrato to Ollioules | 318.85 mi (513.14 km) |
| Monserrato to Olonne-sur-Mer | 746.48 mi (1,201.34 km) |
| Monserrato to Oloron-Sainte-Marie | 575.12 mi (925.56 km) |
| Monserrato to Onet Village | 488.50 mi (786.16 km) |
| Monserrato to Onnaing | 815.65 mi (1,312.66 km) |
| Monserrato to Orange | 405.10 mi (651.94 km) |
| Monserrato to Orchies | 827.06 mi (1,331.03 km) |
| Monserrato to Orleans | 698.40 mi (1,123.96 km) |
| Monserrato to Orly | 736.24 mi (1,184.86 km) |
| Monserrato to Ormesson-sur-Marne | 735.53 mi (1,183.73 km) |
| Monserrato to Orsay | 738.17 mi (1,187.97 km) |
