| Altamont to Orbetello | 5,898.03 mi (9,491.96 km) |
| Altamont to Oria | 6,183.64 mi (9,951.61 km) |
| Altamont to Oristano | 5,967.95 mi (9,604.48 km) |
| Altamont to Orta Nova | 6,084.30 mi (9,791.74 km) |
| Altamont to Orte | 5,929.05 mi (9,541.88 km) |
| Altamont to Ortona | 5,989.36 mi (9,638.95 km) |
| Altamont to Orvieto | 5,906.48 mi (9,505.56 km) |
| Altamont to Orzinuovi | 5,692.27 mi (9,160.82 km) |
| Altamont to Osimo | 5,898.36 mi (9,492.49 km) |
| Altamont to Ospitaletto | 5,687.14 mi (9,152.57 km) |
| Altamont to Ostuni | 6,168.26 mi (9,926.86 km) |
| Altamont to Ottaviano | 6,080.34 mi (9,785.36 km) |
| Altamont to Ovada | 5,700.24 mi (9,173.65 km) |
| Altamont to Ozieri | 5,941.47 mi (9,561.87 km) |
| Altamont to Paceco | 6,195.63 mi (9,970.90 km) |
