| Roudnice nad Labem to Oignies | 495.31 mi (797.12 km) |
| Roudnice nad Labem to Oissel | 590.31 mi (950.01 km) |
| Roudnice nad Labem to Olivet | 585.24 mi (941.86 km) |
| Roudnice nad Labem to Ollioules | 640.97 mi (1,031.54 km) |
| Roudnice nad Labem to Olonne-sur-Mer | 780.10 mi (1,255.45 km) |
| Roudnice nad Labem to Oloron-Sainte-Marie | 860.02 mi (1,384.07 km) |
| Roudnice nad Labem to Onet Village | 686.52 mi (1,104.85 km) |
| Roudnice nad Labem to Onnaing | 469.19 mi (755.08 km) |
| Roudnice nad Labem to Orange | 619.56 mi (997.09 km) |
| Roudnice nad Labem to Orchies | 484.29 mi (779.39 km) |
| Roudnice nad Labem to Orleans | 583.88 mi (939.66 km) |
| Roudnice nad Labem to Orly | 543.58 mi (874.81 km) |
| Roudnice nad Labem to Ormesson-sur-Marne | 536.40 mi (863.26 km) |
| Roudnice nad Labem to Orsay | 553.45 mi (890.70 km) |
| Roudnice nad Labem to Orthez | 853.27 mi (1,373.20 km) |
