| Mount Pleasant to Orbetello | 4,782.10 mi (7,696.05 km) |
| Mount Pleasant to Oria | 5,138.33 mi (8,269.35 km) |
| Mount Pleasant to Oristano | 4,735.51 mi (7,621.07 km) |
| Mount Pleasant to Orta Nova | 5,022.73 mi (8,083.31 km) |
| Mount Pleasant to Orte | 4,835.07 mi (7,781.29 km) |
| Mount Pleasant to Ortona | 4,929.88 mi (7,933.88 km) |
| Mount Pleasant to Orvieto | 4,814.55 mi (7,748.26 km) |
| Mount Pleasant to Orzinuovi | 4,637.52 mi (7,463.37 km) |
| Mount Pleasant to Osimo | 4,852.66 mi (7,809.60 km) |
| Mount Pleasant to Ospitaletto | 4,639.29 mi (7,466.22 km) |
| Mount Pleasant to Ostuni | 5,127.98 mi (8,252.69 km) |
| Mount Pleasant to Ottaviano | 4,982.21 mi (8,018.10 km) |
| Mount Pleasant to Ovada | 4,601.50 mi (7,405.40 km) |
| Mount Pleasant to Ozieri | 4,734.89 mi (7,620.07 km) |
| Mount Pleasant to Paceco | 4,985.25 mi (8,022.99 km) |
