| Flemalle-Haute to Oria | 910.76 mi (1,465.73 km) |
| Flemalle-Haute to Oristano | 754.30 mi (1,213.93 km) |
| Flemalle-Haute to Orta Nova | 806.20 mi (1,297.45 km) |
| Flemalle-Haute to Orte | 651.01 mi (1,047.70 km) |
| Flemalle-Haute to Ortona | 710.14 mi (1,142.86 km) |
| Flemalle-Haute to Orvieto | 628.70 mi (1,011.80 km) |
| Flemalle-Haute to Orzinuovi | 414.38 mi (666.87 km) |
| Flemalle-Haute to Osimo | 619.30 mi (996.66 km) |
| Flemalle-Haute to Ospitaletto | 408.28 mi (657.06 km) |
| Flemalle-Haute to Ostuni | 896.20 mi (1,442.29 km) |
| Flemalle-Haute to Ottaviano | 800.55 mi (1,288.36 km) |
| Flemalle-Haute to Ovada | 437.69 mi (704.39 km) |
| Flemalle-Haute to Ozieri | 712.69 mi (1,146.96 km) |
| Flemalle-Haute to Paceco | 938.56 mi (1,510.47 km) |
| Flemalle-Haute to Pachino | 1,071.37 mi (1,724.21 km) |
