| Hamtramck to Orbetello | 4,526.79 mi (7,285.17 km) |
| Hamtramck to Oria | 4,871.42 mi (7,839.79 km) |
| Hamtramck to Oristano | 4,518.80 mi (7,272.31 km) |
| Hamtramck to Orta Nova | 4,757.34 mi (7,656.20 km) |
| Hamtramck to Orte | 4,574.19 mi (7,361.44 km) |
| Hamtramck to Ortona | 4,660.79 mi (7,500.81 km) |
| Hamtramck to Orvieto | 4,552.31 mi (7,326.24 km) |
| Hamtramck to Orzinuovi | 4,357.11 mi (7,012.09 km) |
| Hamtramck to Osimo | 4,576.54 mi (7,365.23 km) |
| Hamtramck to Ospitaletto | 4,356.69 mi (7,011.42 km) |
| Hamtramck to Ostuni | 4,859.12 mi (7,820.00 km) |
| Hamtramck to Ottaviano | 4,727.49 mi (7,608.15 km) |
| Hamtramck to Ovada | 4,334.42 mi (6,975.57 km) |
| Hamtramck to Ozieri | 4,509.07 mi (7,256.64 km) |
| Hamtramck to Paceco | 4,768.62 mi (7,674.35 km) |
