| Cassino to Octeville | 932.82 mi (1,501.23 km) |
| Cassino to Oignies | 807.54 mi (1,299.61 km) |
| Cassino to Oissel | 819.86 mi (1,319.44 km) |
| Cassino to Olivet | 731.42 mi (1,177.11 km) |
| Cassino to Ollioules | 423.25 mi (681.15 km) |
| Cassino to Olonne-sur-Mer | 847.98 mi (1,364.69 km) |
| Cassino to Oloron-Sainte-Marie | 745.65 mi (1,200.00 km) |
| Cassino to Onet Village | 601.47 mi (967.97 km) |
| Cassino to Onnaing | 785.20 mi (1,263.67 km) |
| Cassino to Orange | 491.97 mi (791.75 km) |
| Cassino to Orchies | 800.20 mi (1,287.80 km) |
| Cassino to Orleans | 732.54 mi (1,178.90 km) |
| Cassino to Orly | 747.93 mi (1,203.68 km) |
| Cassino to Ormesson-sur-Marne | 744.49 mi (1,198.15 km) |
| Cassino to Orsay | 753.45 mi (1,212.57 km) |
