| Mount Clemens to Orbetello | 4,511.42 mi (7,260.43 km) |
| Mount Clemens to Oria | 4,855.89 mi (7,814.79 km) |
| Mount Clemens to Oristano | 4,503.83 mi (7,248.22 km) |
| Mount Clemens to Orta Nova | 4,741.84 mi (7,631.25 km) |
| Mount Clemens to Orte | 4,558.75 mi (7,336.60 km) |
| Mount Clemens to Ortona | 4,645.26 mi (7,475.83 km) |
| Mount Clemens to Orvieto | 4,536.87 mi (7,301.38 km) |
| Mount Clemens to Orzinuovi | 4,341.52 mi (6,987.01 km) |
| Mount Clemens to Osimo | 4,560.96 mi (7,340.16 km) |
| Mount Clemens to Ospitaletto | 4,341.08 mi (6,986.30 km) |
| Mount Clemens to Ostuni | 4,843.57 mi (7,794.97 km) |
| Mount Clemens to Ottaviano | 4,712.09 mi (7,583.37 km) |
| Mount Clemens to Ovada | 4,318.96 mi (6,950.69 km) |
| Mount Clemens to Ozieri | 4,494.00 mi (7,232.40 km) |
| Mount Clemens to Paceco | 4,753.61 mi (7,650.19 km) |
