| Chaudfontaine to Oria | 904.64 mi (1,455.88 km) |
| Chaudfontaine to Oristano | 751.49 mi (1,209.40 km) |
| Chaudfontaine to Orta Nova | 800.35 mi (1,288.05 km) |
| Chaudfontaine to Orte | 645.95 mi (1,039.55 km) |
| Chaudfontaine to Ortona | 704.41 mi (1,133.64 km) |
| Chaudfontaine to Orvieto | 623.68 mi (1,003.71 km) |
| Chaudfontaine to Orzinuovi | 409.46 mi (658.96 km) |
| Chaudfontaine to Osimo | 613.53 mi (987.38 km) |
| Chaudfontaine to Ospitaletto | 403.20 mi (648.89 km) |
| Chaudfontaine to Ostuni | 890.05 mi (1,432.39 km) |
| Chaudfontaine to Ottaviano | 795.17 mi (1,279.70 km) |
| Chaudfontaine to Ovada | 433.92 mi (698.33 km) |
| Chaudfontaine to Ozieri | 709.58 mi (1,141.96 km) |
| Chaudfontaine to Paceco | 934.38 mi (1,503.73 km) |
| Chaudfontaine to Pachino | 1,066.58 mi (1,716.49 km) |
