| Grand-Couronne to Oria | 1,014.11 mi (1,632.05 km) |
| Grand-Couronne to Oristano | 751.13 mi (1,208.83 km) |
| Grand-Couronne to Orta Nova | 901.47 mi (1,450.77 km) |
| Grand-Couronne to Orte | 724.11 mi (1,165.34 km) |
| Grand-Couronne to Ortona | 804.15 mi (1,294.16 km) |
| Grand-Couronne to Orvieto | 701.59 mi (1,129.10 km) |
| Grand-Couronne to Orzinuovi | 498.67 mi (802.53 km) |
| Grand-Couronne to Osimo | 718.18 mi (1,155.80 km) |
| Grand-Couronne to Ospitaletto | 497.90 mi (801.29 km) |
| Grand-Couronne to Ostuni | 1,001.31 mi (1,611.46 km) |
| Grand-Couronne to Ottaviano | 879.13 mi (1,414.82 km) |
| Grand-Couronne to Ovada | 485.22 mi (780.88 km) |
| Grand-Couronne to Ozieri | 720.31 mi (1,159.22 km) |
| Grand-Couronne to Paceco | 972.50 mi (1,565.09 km) |
| Grand-Couronne to Pachino | 1,122.81 mi (1,806.98 km) |
