| Roosevelt to Orbetello | 4,188.33 mi (6,740.47 km) |
| Roosevelt to Oria | 4,541.31 mi (7,308.53 km) |
| Roosevelt to Oristano | 4,157.63 mi (6,691.05 km) |
| Roosevelt to Orta Nova | 4,425.91 mi (7,122.81 km) |
| Roosevelt to Orte | 4,239.32 mi (6,822.53 km) |
| Roosevelt to Ortona | 4,331.35 mi (6,970.63 km) |
| Roosevelt to Orvieto | 4,218.21 mi (6,788.56 km) |
| Roosevelt to Orzinuovi | 4,033.86 mi (6,491.87 km) |
| Roosevelt to Osimo | 4,251.27 mi (6,841.76 km) |
| Roosevelt to Ospitaletto | 4,034.86 mi (6,493.48 km) |
| Roosevelt to Ostuni | 4,530.19 mi (7,290.64 km) |
| Roosevelt to Ottaviano | 4,389.37 mi (7,064.02 km) |
| Roosevelt to Ovada | 4,002.58 mi (6,441.53 km) |
| Roosevelt to Ozieri | 4,153.04 mi (6,683.67 km) |
| Roosevelt to Paceco | 4,408.35 mi (7,094.55 km) |
