| Oldsmar to Orbetello | 5,122.80 mi (8,244.36 km) |
| Oldsmar to Oria | 5,480.27 mi (8,819.64 km) |
| Oldsmar to Oristano | 5,066.96 mi (8,154.48 km) |
| Oldsmar to Orta Nova | 5,364.77 mi (8,633.77 km) |
| Oldsmar to Orte | 5,176.84 mi (8,331.31 km) |
| Oldsmar to Ortona | 5,273.14 mi (8,486.31 km) |
| Oldsmar to Orvieto | 5,156.71 mi (8,298.92 km) |
| Oldsmar to Orzinuovi | 4,984.41 mi (8,021.63 km) |
| Oldsmar to Osimo | 5,197.79 mi (8,365.03 km) |
| Oldsmar to Ospitaletto | 4,986.64 mi (8,025.23 km) |
| Oldsmar to Ostuni | 5,470.41 mi (8,803.77 km) |
| Oldsmar to Ottaviano | 5,321.92 mi (8,564.81 km) |
| Oldsmar to Ovada | 4,945.65 mi (7,959.25 km) |
| Oldsmar to Ozieri | 5,068.66 mi (8,157.21 km) |
| Oldsmar to Paceco | 5,315.42 mi (8,554.34 km) |
