| Atca to Orbetello | 949.46 mi (1,528.01 km) |
| Atca to Oria | 594.43 mi (956.64 km) |
| Atca to Oristano | 1,062.37 mi (1,709.72 km) |
| Atca to Orta Nova | 706.22 mi (1,136.55 km) |
| Atca to Orte | 891.91 mi (1,435.40 km) |
| Atca to Ortona | 791.39 mi (1,273.61 km) |
| Atca to Orvieto | 910.27 mi (1,464.93 km) |
| Atca to Orzinuovi | 1,073.92 mi (1,728.30 km) |
| Atca to Osimo | 861.80 mi (1,386.94 km) |
| Atca to Ospitaletto | 1,071.83 mi (1,724.95 km) |
| Atca to Ostuni | 601.13 mi (967.43 km) |
| Atca to Ottaviano | 761.06 mi (1,224.81 km) |
| Atca to Ovada | 1,114.76 mi (1,794.04 km) |
| Atca to Ozieri | 1,042.87 mi (1,678.33 km) |
| Atca to Paceco | 852.79 mi (1,372.43 km) |
