| Colwyn Bay to Orbetello | 1,015.74 mi (1,634.67 km) |
| Colwyn Bay to Oria | 1,330.60 mi (2,141.40 km) |
| Colwyn Bay to Oristano | 1,090.07 mi (1,754.29 km) |
| Colwyn Bay to Orta Nova | 1,221.40 mi (1,965.66 km) |
| Colwyn Bay to Orte | 1,051.62 mi (1,692.43 km) |
| Colwyn Bay to Ortona | 1,123.96 mi (1,808.84 km) |
| Colwyn Bay to Orvieto | 1,028.94 mi (1,655.92 km) |
| Colwyn Bay to Orzinuovi | 818.39 mi (1,317.08 km) |
| Colwyn Bay to Osimo | 1,034.83 mi (1,665.39 km) |
| Colwyn Bay to Ospitaletto | 815.33 mi (1,312.14 km) |
| Colwyn Bay to Ostuni | 1,316.78 mi (2,119.16 km) |
| Colwyn Bay to Ottaviano | 1,205.97 mi (1,940.83 km) |
| Colwyn Bay to Ovada | 816.86 mi (1,314.62 km) |
| Colwyn Bay to Ozieri | 1,059.45 mi (1,705.01 km) |
| Colwyn Bay to Paceco | 1,310.52 mi (2,109.07 km) |
