| Weirton to Orbetello | 4,502.67 mi (7,246.34 km) |
| Weirton to Oria | 4,851.85 mi (7,808.29 km) |
| Weirton to Oristano | 4,483.22 mi (7,215.04 km) |
| Weirton to Orta Nova | 4,736.97 mi (7,623.42 km) |
| Weirton to Orte | 4,551.89 mi (7,325.56 km) |
| Weirton to Ortona | 4,641.25 mi (7,469.37 km) |
| Weirton to Orvieto | 4,530.36 mi (7,290.91 km) |
| Weirton to Orzinuovi | 4,340.09 mi (6,984.71 km) |
| Weirton to Osimo | 4,558.89 mi (7,336.83 km) |
| Weirton to Ospitaletto | 4,340.35 mi (6,985.12 km) |
| Weirton to Ostuni | 4,840.10 mi (7,789.40 km) |
| Weirton to Ottaviano | 4,703.81 mi (7,570.04 km) |
| Weirton to Ovada | 4,313.24 mi (6,941.49 km) |
| Weirton to Ozieri | 4,476.11 mi (7,203.61 km) |
| Weirton to Paceco | 4,733.80 mi (7,618.32 km) |
