| Carbondale to Orbetello | 4,982.57 mi (8,018.66 km) |
| Carbondale to Oria | 5,328.37 mi (8,575.18 km) |
| Carbondale to Oristano | 4,970.63 mi (7,999.46 km) |
| Carbondale to Orta Nova | 5,214.09 mi (8,391.27 km) |
| Carbondale to Orte | 5,030.44 mi (8,095.72 km) |
| Carbondale to Ortona | 5,117.70 mi (8,236.14 km) |
| Carbondale to Orvieto | 5,008.65 mi (8,060.64 km) |
| Carbondale to Orzinuovi | 4,814.46 mi (7,748.12 km) |
| Carbondale to Osimo | 5,033.82 mi (8,101.14 km) |
| Carbondale to Ospitaletto | 4,814.16 mi (7,747.64 km) |
| Carbondale to Ostuni | 5,316.18 mi (8,555.57 km) |
| Carbondale to Ottaviano | 5,183.43 mi (8,341.92 km) |
| Carbondale to Ovada | 4,790.89 mi (7,710.19 km) |
| Carbondale to Ozieri | 4,961.95 mi (7,985.48 km) |
| Carbondale to Paceco | 5,220.84 mi (8,402.14 km) |
