| Casier to Octeville | 703.53 mi (1,132.22 km) |
| Casier to Oignies | 542.98 mi (873.84 km) |
| Casier to Oissel | 581.33 mi (935.56 km) |
| Casier to Olivet | 515.01 mi (828.82 km) |
| Casier to Ollioules | 362.59 mi (583.54 km) |
| Casier to Olonne-sur-Mer | 676.17 mi (1,088.19 km) |
| Casier to Oloron-Sainte-Marie | 658.30 mi (1,059.42 km) |
| Casier to Onet Village | 482.07 mi (775.82 km) |
| Casier to Onnaing | 517.96 mi (833.58 km) |
| Casier to Orange | 381.05 mi (613.23 km) |
| Casier to Orchies | 534.13 mi (859.60 km) |
| Casier to Orleans | 515.26 mi (829.22 km) |
| Casier to Orly | 511.38 mi (822.98 km) |
| Casier to Ormesson-sur-Marne | 506.26 mi (814.74 km) |
| Casier to Orsay | 519.03 mi (835.29 km) |
