| Croydon to Orbetello | 814.60 mi (1,310.97 km) |
| Croydon to Oria | 1,130.96 mi (1,820.10 km) |
| Croydon to Oristano | 895.43 mi (1,441.06 km) |
| Croydon to Orta Nova | 1,021.04 mi (1,643.21 km) |
| Croydon to Orte | 850.38 mi (1,368.56 km) |
| Croydon to Ortona | 923.53 mi (1,486.29 km) |
| Croydon to Orvieto | 827.70 mi (1,332.06 km) |
| Croydon to Orzinuovi | 617.61 mi (993.94 km) |
| Croydon to Osimo | 834.81 mi (1,343.50 km) |
| Croydon to Ospitaletto | 614.82 mi (989.45 km) |
| Croydon to Ostuni | 1,117.33 mi (1,798.17 km) |
| Croydon to Ottaviano | 1,004.80 mi (1,617.07 km) |
| Croydon to Ovada | 615.82 mi (991.06 km) |
| Croydon to Ozieri | 862.81 mi (1,388.55 km) |
| Croydon to Paceco | 1,111.30 mi (1,788.46 km) |
