| Morriston to Octeville | 173.02 mi (278.44 km) |
| Morriston to Oignies | 311.99 mi (502.11 km) |
| Morriston to Oissel | 273.07 mi (439.47 km) |
| Morriston to Olivet | 369.76 mi (595.07 km) |
| Morriston to Ollioules | 744.56 mi (1,198.25 km) |
| Morriston to Olonne-sur-Mer | 367.61 mi (591.61 km) |
| Morriston to Oloron-Sainte-Marie | 605.46 mi (974.39 km) |
| Morriston to Onet Village | 587.25 mi (945.09 km) |
| Morriston to Onnaing | 339.04 mi (545.63 km) |
| Morriston to Orange | 658.30 mi (1,059.44 km) |
| Morriston to Orchies | 322.37 mi (518.81 km) |
| Morriston to Orleans | 368.06 mi (592.34 km) |
| Morriston to Orly | 344.95 mi (555.15 km) |
| Morriston to Ormesson-sur-Marne | 348.43 mi (560.74 km) |
| Morriston to Orsay | 339.64 mi (546.60 km) |
