| Castellana Grotte to Octeville | 1,091.59 mi (1,756.75 km) |
| Castellana Grotte to Oignies | 949.25 mi (1,527.67 km) |
| Castellana Grotte to Oissel | 974.39 mi (1,568.13 km) |
| Castellana Grotte to Olivet | 892.58 mi (1,436.47 km) |
| Castellana Grotte to Ollioules | 601.14 mi (967.43 km) |
| Castellana Grotte to Olonne-sur-Mer | 1,020.14 mi (1,641.75 km) |
| Castellana Grotte to Oloron-Sainte-Marie | 924.08 mi (1,487.16 km) |
| Castellana Grotte to Onet Village | 777.72 mi (1,251.62 km) |
| Castellana Grotte to Onnaing | 925.12 mi (1,488.84 km) |
| Castellana Grotte to Orange | 667.54 mi (1,074.30 km) |
| Castellana Grotte to Orchies | 940.94 mi (1,514.29 km) |
| Castellana Grotte to Orleans | 893.45 mi (1,437.87 km) |
| Castellana Grotte to Orly | 902.58 mi (1,452.56 km) |
| Castellana Grotte to Ormesson-sur-Marne | 898.46 mi (1,445.94 km) |
| Castellana Grotte to Orsay | 908.95 mi (1,462.82 km) |
