| Florham Park to Orbetello | 4,220.48 mi (6,792.20 km) |
| Florham Park to Oria | 4,572.94 mi (7,359.44 km) |
| Florham Park to Oristano | 4,191.53 mi (6,745.61 km) |
| Florham Park to Orta Nova | 4,457.60 mi (7,173.81 km) |
| Florham Park to Orte | 4,271.21 mi (6,873.84 km) |
| Florham Park to Ortona | 4,362.84 mi (7,021.32 km) |
| Florham Park to Orvieto | 4,250.03 mi (6,839.76 km) |
| Florham Park to Orzinuovi | 4,064.74 mi (6,541.56 km) |
| Florham Park to Osimo | 4,282.41 mi (6,891.87 km) |
| Florham Park to Ospitaletto | 4,065.63 mi (6,543.00 km) |
| Florham Park to Ostuni | 4,561.72 mi (7,341.39 km) |
| Florham Park to Ottaviano | 4,421.57 mi (7,115.83 km) |
| Florham Park to Ovada | 4,034.12 mi (6,492.29 km) |
| Florham Park to Ozieri | 4,186.54 mi (6,737.59 km) |
| Florham Park to Paceco | 4,442.27 mi (7,149.14 km) |
