| Caltagirone to Oegstgeest | 1,141.90 mi (1,837.71 km) |
| Caltagirone to Oirschot | 1,083.41 mi (1,743.57 km) |
| Caltagirone to Oisterwijk | 1,090.51 mi (1,755.01 km) |
| Caltagirone to Oldebroek | 1,130.69 mi (1,819.67 km) |
| Caltagirone to Oldenzaal | 1,104.72 mi (1,777.88 km) |
| Caltagirone to Ommen | 1,125.94 mi (1,812.03 km) |
| Caltagirone to Oosterend | 1,162.64 mi (1,871.08 km) |
| Caltagirone to Oosterhout | 1,101.20 mi (1,772.21 km) |
| Caltagirone to Oosterwolde | 1,158.06 mi (1,863.71 km) |
| Caltagirone to Oostzaan | 1,148.69 mi (1,848.63 km) |
| Caltagirone to Opmeer | 1,163.75 mi (1,872.87 km) |
| Caltagirone to Oss | 1,095.42 mi (1,762.92 km) |
| Caltagirone to Oud-Beijerland | 1,121.28 mi (1,804.52 km) |
| Caltagirone to Oudenbosch | 1,105.02 mi (1,778.35 km) |
| Caltagirone to Oudewater | 1,123.63 mi (1,808.30 km) |
