| Chalons-en-Champagne to Oignies | 121.09 mi (194.87 km) |
| Chalons-en-Champagne to Oissel | 150.30 mi (241.88 km) |
| Chalons-en-Champagne to Olivet | 135.95 mi (218.78 km) |
| Chalons-en-Champagne to Ollioules | 408.20 mi (656.94 km) |
| Chalons-en-Champagne to Olonne-sur-Mer | 330.46 mi (531.83 km) |
| Chalons-en-Champagne to Oloron-Sainte-Marie | 463.82 mi (746.45 km) |
| Chalons-en-Champagne to Onet Village | 328.18 mi (528.15 km) |
| Chalons-en-Champagne to Onnaing | 104.60 mi (168.34 km) |
| Chalons-en-Champagne to Orange | 333.64 mi (536.95 km) |
| Chalons-en-Champagne to Orchies | 116.17 mi (186.96 km) |
| Chalons-en-Champagne to Orleans | 134.12 mi (215.85 km) |
| Chalons-en-Champagne to Orly | 90.87 mi (146.24 km) |
| Chalons-en-Champagne to Ormesson-sur-Marne | 83.86 mi (134.96 km) |
| Chalons-en-Champagne to Orsay | 100.65 mi (161.98 km) |
| Chalons-en-Champagne to Orthez | 450.40 mi (724.85 km) |
