| Carson to Orbetello | 6,273.38 mi (10,096.04 km) |
| Carson to Oria | 6,582.54 mi (10,593.58 km) |
| Carson to Oristano | 6,316.88 mi (10,166.04 km) |
| Carson to Orta Nova | 6,477.00 mi (10,423.73 km) |
| Carson to Orte | 6,310.32 mi (10,155.47 km) |
| Carson to Ortona | 6,380.09 mi (10,267.76 km) |
| Carson to Orvieto | 6,287.64 mi (10,118.97 km) |
| Carson to Orzinuovi | 6,076.25 mi (9,778.78 km) |
| Carson to Osimo | 6,289.83 mi (10,122.50 km) |
| Carson to Ospitaletto | 6,072.55 mi (9,772.82 km) |
| Carson to Ostuni | 6,567.90 mi (10,570.01 km) |
| Carson to Ottaviano | 6,464.56 mi (10,403.70 km) |
| Carson to Ovada | 6,074.37 mi (9,775.75 km) |
| Carson to Ozieri | 6,296.16 mi (10,132.69 km) |
| Carson to Paceco | 6,555.86 mi (10,550.64 km) |
