| Altamonte Springs to Orbetello | 5,036.25 mi (8,105.06 km) |
| Altamonte Springs to Oria | 5,393.82 mi (8,680.51 km) |
| Altamonte Springs to Oristano | 4,979.57 mi (8,013.84 km) |
| Altamonte Springs to Orta Nova | 5,278.35 mi (8,494.68 km) |
| Altamonte Springs to Orte | 5,090.40 mi (8,192.20 km) |
| Altamonte Springs to Ortona | 5,186.88 mi (8,347.47 km) |
| Altamonte Springs to Orvieto | 5,070.32 mi (8,159.89 km) |
| Altamonte Springs to Orzinuovi | 4,898.68 mi (7,883.66 km) |
| Altamonte Springs to Osimo | 5,111.78 mi (8,226.61 km) |
| Altamonte Springs to Ospitaletto | 4,900.98 mi (7,887.37 km) |
| Altamonte Springs to Ostuni | 5,384.02 mi (8,664.74 km) |
| Altamonte Springs to Ottaviano | 5,235.24 mi (8,425.30 km) |
| Altamonte Springs to Ovada | 4,859.53 mi (7,820.65 km) |
| Altamonte Springs to Ozieri | 4,981.44 mi (8,016.85 km) |
| Altamonte Springs to Paceco | 5,227.92 mi (8,413.53 km) |
