| Fort Pierce to Orbetello | 5,041.08 mi (8,112.83 km) |
| Fort Pierce to Oria | 5,399.14 mi (8,689.08 km) |
| Fort Pierce to Oristano | 4,978.35 mi (8,011.89 km) |
| Fort Pierce to Orta Nova | 5,283.87 mi (8,503.57 km) |
| Fort Pierce to Orte | 5,095.92 mi (8,201.10 km) |
| Fort Pierce to Ortona | 5,193.38 mi (8,357.93 km) |
| Fort Pierce to Orvieto | 5,076.15 mi (8,169.28 km) |
| Fort Pierce to Orzinuovi | 4,908.22 mi (7,899.01 km) |
| Fort Pierce to Osimo | 5,119.74 mi (8,239.43 km) |
| Fort Pierce to Ospitaletto | 4,910.87 mi (7,903.29 km) |
| Fort Pierce to Ostuni | 5,389.71 mi (8,673.90 km) |
| Fort Pierce to Ottaviano | 5,239.17 mi (8,431.62 km) |
| Fort Pierce to Ovada | 4,867.03 mi (7,832.73 km) |
| Fort Pierce to Ozieri | 4,981.69 mi (8,017.26 km) |
| Fort Pierce to Paceco | 5,225.64 mi (8,409.86 km) |
