| Chippenham to Orbetello | 882.61 mi (1,420.42 km) |
| Chippenham to Oria | 1,206.78 mi (1,942.13 km) |
| Chippenham to Oristano | 948.78 mi (1,526.92 km) |
| Chippenham to Orta Nova | 1,095.55 mi (1,763.12 km) |
| Chippenham to Orte | 921.22 mi (1,482.57 km) |
| Chippenham to Ortona | 998.02 mi (1,606.15 km) |
| Chippenham to Orvieto | 898.61 mi (1,446.17 km) |
| Chippenham to Orzinuovi | 691.68 mi (1,113.15 km) |
| Chippenham to Osimo | 910.37 mi (1,465.10 km) |
| Chippenham to Ospitaletto | 689.74 mi (1,110.02 km) |
| Chippenham to Ostuni | 1,193.49 mi (1,920.74 km) |
| Chippenham to Ottaviano | 1,076.14 mi (1,731.89 km) |
| Chippenham to Ovada | 683.64 mi (1,100.21 km) |
| Chippenham to Ozieri | 919.24 mi (1,479.38 km) |
| Chippenham to Paceco | 1,172.38 mi (1,886.76 km) |
