| Morriston to Orbetello | 953.17 mi (1,533.97 km) |
| Morriston to Oria | 1,281.79 mi (2,062.84 km) |
| Morriston to Oristano | 1,009.21 mi (1,624.17 km) |
| Morriston to Orta Nova | 1,169.84 mi (1,882.68 km) |
| Morriston to Orte | 993.48 mi (1,598.85 km) |
| Morriston to Ortona | 1,072.39 mi (1,725.84 km) |
| Morriston to Orvieto | 970.94 mi (1,562.58 km) |
| Morriston to Orzinuovi | 766.26 mi (1,233.17 km) |
| Morriston to Osimo | 985.46 mi (1,585.94 km) |
| Morriston to Ospitaletto | 764.79 mi (1,230.81 km) |
| Morriston to Ostuni | 1,268.71 mi (2,041.79 km) |
| Morriston to Ottaviano | 1,148.50 mi (1,848.34 km) |
| Morriston to Ovada | 754.61 mi (1,214.42 km) |
| Morriston to Ozieri | 981.95 mi (1,580.30 km) |
| Morriston to Paceco | 1,237.72 mi (1,991.92 km) |
