| South Euclid to Orbetello | 4,498.26 mi (7,239.25 km) |
| South Euclid to Oria | 4,845.31 mi (7,797.78 km) |
| South Euclid to Oristano | 4,484.47 mi (7,217.07 km) |
| South Euclid to Orta Nova | 4,730.79 mi (7,613.47 km) |
| South Euclid to Orte | 4,546.60 mi (7,317.04 km) |
| South Euclid to Ortona | 4,634.63 mi (7,458.72 km) |
| South Euclid to Orvieto | 4,524.89 mi (7,282.11 km) |
| South Euclid to Orzinuovi | 4,332.14 mi (6,971.90 km) |
| South Euclid to Osimo | 4,551.32 mi (7,324.64 km) |
| South Euclid to Ospitaletto | 4,332.07 mi (6,971.79 km) |
| South Euclid to Ostuni | 4,833.29 mi (7,778.44 km) |
| South Euclid to Ottaviano | 4,699.24 mi (7,562.70 km) |
| South Euclid to Ovada | 4,307.32 mi (6,931.96 km) |
| South Euclid to Ozieri | 4,476.06 mi (7,203.53 km) |
| South Euclid to Paceco | 4,734.76 mi (7,619.86 km) |
