| Drexel Hill to Orbetello | 4,291.81 mi (6,907.00 km) |
| Drexel Hill to Oria | 4,644.64 mi (7,474.83 km) |
| Drexel Hill to Oristano | 4,261.34 mi (6,857.97 km) |
| Drexel Hill to Orta Nova | 4,529.26 mi (7,289.13 km) |
| Drexel Hill to Orte | 4,342.73 mi (6,988.95 km) |
| Drexel Hill to Ortona | 4,434.64 mi (7,136.86 km) |
| Drexel Hill to Orvieto | 4,321.60 mi (6,954.94 km) |
| Drexel Hill to Orzinuovi | 4,136.93 mi (6,657.74 km) |
| Drexel Hill to Osimo | 4,354.44 mi (7,007.79 km) |
| Drexel Hill to Ospitaletto | 4,137.89 mi (6,659.29 km) |
| Drexel Hill to Ostuni | 4,633.49 mi (7,456.89 km) |
| Drexel Hill to Ottaviano | 4,492.86 mi (7,230.56 km) |
| Drexel Hill to Ovada | 4,105.88 mi (6,607.78 km) |
| Drexel Hill to Ozieri | 4,256.74 mi (6,850.55 km) |
| Drexel Hill to Paceco | 4,512.07 mi (7,261.47 km) |
