| Summerville to Orbetello | 4,792.27 mi (7,712.42 km) |
| Summerville to Oria | 5,148.28 mi (8,285.36 km) |
| Summerville to Oristano | 4,746.89 mi (7,639.38 km) |
| Summerville to Orta Nova | 5,032.68 mi (8,099.32 km) |
| Summerville to Orte | 4,845.08 mi (7,797.40 km) |
| Summerville to Ortona | 4,939.67 mi (7,949.63 km) |
| Summerville to Orvieto | 4,824.50 mi (7,764.29 km) |
| Summerville to Orzinuovi | 4,646.78 mi (7,478.28 km) |
| Summerville to Osimo | 4,862.17 mi (7,824.90 km) |
| Summerville to Ospitaletto | 4,648.49 mi (7,481.02 km) |
| Summerville to Ostuni | 5,137.86 mi (8,268.59 km) |
| Summerville to Ottaviano | 4,992.49 mi (8,034.64 km) |
| Summerville to Ovada | 4,611.20 mi (7,421.01 km) |
| Summerville to Ozieri | 4,745.98 mi (7,637.92 km) |
| Summerville to Paceco | 4,996.75 mi (8,041.49 km) |
