| Darlington to Octeville | 338.59 mi (544.90 km) |
| Darlington to Oignies | 339.22 mi (545.92 km) |
| Darlington to Oissel | 375.47 mi (604.27 km) |
| Darlington to Olivet | 483.90 mi (778.75 km) |
| Darlington to Ollioules | 854.63 mi (1,375.39 km) |
| Darlington to Olonne-sur-Mer | 552.20 mi (888.68 km) |
| Darlington to Oloron-Sainte-Marie | 784.18 mi (1,262.02 km) |
| Darlington to Onet Village | 726.04 mi (1,168.46 km) |
| Darlington to Onnaing | 358.71 mi (577.29 km) |
| Darlington to Orange | 772.07 mi (1,242.53 km) |
| Darlington to Orchies | 344.93 mi (555.12 km) |
| Darlington to Orleans | 481.45 mi (774.82 km) |
| Darlington to Orly | 433.75 mi (698.05 km) |
| Darlington to Ormesson-sur-Marne | 433.53 mi (697.69 km) |
| Darlington to Orsay | 433.38 mi (697.45 km) |
