| Roudnice nad Labem to Oria | 704.78 mi (1,134.23 km) |
| Roudnice nad Labem to Oristano | 776.97 mi (1,250.42 km) |
| Roudnice nad Labem to Orta Nova | 632.20 mi (1,017.43 km) |
| Roudnice nad Labem to Orte | 557.48 mi (897.18 km) |
| Roudnice nad Labem to Ortona | 557.99 mi (898.01 km) |
| Roudnice nad Labem to Orvieto | 542.16 mi (872.53 km) |
| Roudnice nad Labem to Orzinuovi | 400.77 mi (644.97 km) |
| Roudnice nad Labem to Osimo | 481.05 mi (774.17 km) |
| Roudnice nad Labem to Ospitaletto | 388.10 mi (624.59 km) |
| Roudnice nad Labem to Ostuni | 688.47 mi (1,107.98 km) |
| Roudnice nad Labem to Ottaviano | 661.68 mi (1,064.87 km) |
| Roudnice nad Labem to Ovada | 477.66 mi (768.71 km) |
| Roudnice nad Labem to Ozieri | 725.56 mi (1,167.68 km) |
| Roudnice nad Labem to Paceco | 863.77 mi (1,390.11 km) |
| Roudnice nad Labem to Pachino | 948.09 mi (1,525.81 km) |
