| Upper Arlington to Orbetello | 4,624.65 mi (7,442.65 km) |
| Upper Arlington to Oria | 4,972.51 mi (8,002.48 km) |
| Upper Arlington to Oristano | 4,608.45 mi (7,416.58 km) |
| Upper Arlington to Orta Nova | 4,857.85 mi (7,817.96 km) |
| Upper Arlington to Orte | 4,673.32 mi (7,520.98 km) |
| Upper Arlington to Ortona | 4,761.84 mi (7,663.45 km) |
| Upper Arlington to Orvieto | 4,651.68 mi (7,486.15 km) |
| Upper Arlington to Orzinuovi | 4,459.78 mi (7,177.33 km) |
| Upper Arlington to Osimo | 4,678.85 mi (7,529.89 km) |
| Upper Arlington to Ospitaletto | 4,459.82 mi (7,177.39 km) |
| Upper Arlington to Ostuni | 4,960.59 mi (7,983.29 km) |
| Upper Arlington to Ottaviano | 4,825.70 mi (7,766.22 km) |
| Upper Arlington to Ovada | 4,434.25 mi (7,136.24 km) |
| Upper Arlington to Ozieri | 4,600.64 mi (7,404.01 km) |
| Upper Arlington to Paceco | 4,858.90 mi (7,819.64 km) |
