| Chester to Orbetello | 986.33 mi (1,587.35 km) |
| Chester to Oria | 1,298.88 mi (2,090.34 km) |
| Chester to Oristano | 1,064.79 mi (1,713.62 km) |
| Chester to Orta Nova | 1,190.09 mi (1,915.27 km) |
| Chester to Orte | 1,021.42 mi (1,643.81 km) |
| Chester to Ortona | 1,092.71 mi (1,758.54 km) |
| Chester to Orvieto | 998.73 mi (1,607.31 km) |
| Chester to Orzinuovi | 787.51 mi (1,267.38 km) |
| Chester to Osimo | 1,003.35 mi (1,614.73 km) |
| Chester to Ospitaletto | 784.22 mi (1,262.08 km) |
| Chester to Ostuni | 1,284.98 mi (2,067.97 km) |
| Chester to Ottaviano | 1,175.54 mi (1,891.85 km) |
| Chester to Ovada | 787.66 mi (1,267.61 km) |
| Chester to Ozieri | 1,033.28 mi (1,662.91 km) |
| Chester to Paceco | 1,282.98 mi (2,064.75 km) |
