| Morristown to Orbetello | 4,795.53 mi (7,717.66 km) |
| Morristown to Oria | 5,147.49 mi (8,284.08 km) |
| Morristown to Oristano | 4,766.90 mi (7,671.58 km) |
| Morristown to Orta Nova | 5,032.21 mi (8,098.56 km) |
| Morristown to Orte | 4,846.03 mi (7,798.93 km) |
| Morristown to Ortona | 4,937.25 mi (7,945.74 km) |
| Morristown to Orvieto | 4,824.79 mi (7,764.74 km) |
| Morristown to Orzinuovi | 4,638.36 mi (7,464.71 km) |
| Morristown to Osimo | 4,856.36 mi (7,815.56 km) |
| Morristown to Ospitaletto | 4,639.08 mi (7,465.87 km) |
| Morristown to Ostuni | 5,136.16 mi (8,265.85 km) |
| Morristown to Ottaviano | 4,996.65 mi (8,041.33 km) |
| Morristown to Ovada | 4,608.62 mi (7,416.85 km) |
| Morristown to Ozieri | 4,762.03 mi (7,663.75 km) |
| Morristown to Paceco | 5,017.63 mi (8,075.10 km) |
