| Cayce to Octeville | 4,033.73 mi (6,491.65 km) |
| Cayce to Oignies | 4,211.34 mi (6,777.50 km) |
| Cayce to Oissel | 4,156.63 mi (6,689.46 km) |
| Cayce to Olivet | 4,225.31 mi (6,799.98 km) |
| Cayce to Ollioules | 4,525.71 mi (7,283.43 km) |
| Cayce to Olonne-sur-Mer | 4,092.63 mi (6,586.45 km) |
| Cayce to Oloron-Sainte-Marie | 4,224.24 mi (6,798.25 km) |
| Cayce to Onet Village | 4,343.10 mi (6,989.54 km) |
| Cayce to Onnaing | 4,238.30 mi (6,820.88 km) |
| Cayce to Orange | 4,450.29 mi (7,162.06 km) |
| Cayce to Orchies | 4,221.61 mi (6,794.03 km) |
| Cayce to Orleans | 4,224.77 mi (6,799.10 km) |
| Cayce to Orly | 4,225.90 mi (6,800.93 km) |
| Cayce to Ormesson-sur-Marne | 4,231.15 mi (6,809.37 km) |
| Cayce to Orsay | 4,218.16 mi (6,788.47 km) |
