| Highgate to Octeville | 149.56 mi (240.70 km) |
| Highgate to Oignies | 156.21 mi (251.40 km) |
| Highgate to Oissel | 163.37 mi (262.91 km) |
| Highgate to Olivet | 271.96 mi (437.67 km) |
| Highgate to Ollioules | 646.07 mi (1,039.75 km) |
| Highgate to Olonne-sur-Mer | 355.62 mi (572.31 km) |
| Highgate to Oloron-Sainte-Marie | 579.22 mi (932.17 km) |
| Highgate to Onet Village | 513.65 mi (826.64 km) |
| Highgate to Onnaing | 182.18 mi (293.19 km) |
| Highgate to Orange | 562.29 mi (904.93 km) |
| Highgate to Orchies | 165.62 mi (266.54 km) |
| Highgate to Orleans | 269.56 mi (433.82 km) |
| Highgate to Orly | 225.33 mi (362.64 km) |
| Highgate to Ormesson-sur-Marne | 226.11 mi (363.89 km) |
| Highgate to Orsay | 223.77 mi (360.13 km) |
