| Gillingham to Octeville | 155.04 mi (249.52 km) |
| Gillingham to Oignies | 123.80 mi (199.24 km) |
| Gillingham to Oissel | 143.17 mi (230.40 km) |
| Gillingham to Olivet | 250.67 mi (403.41 km) |
| Gillingham to Ollioules | 621.10 mi (999.56 km) |
| Gillingham to Olonne-sur-Mer | 351.16 mi (565.14 km) |
| Gillingham to Oloron-Sainte-Marie | 568.50 mi (914.91 km) |
| Gillingham to Onet Village | 494.10 mi (795.18 km) |
| Gillingham to Onnaing | 149.65 mi (240.83 km) |
| Gillingham to Orange | 538.13 mi (866.04 km) |
| Gillingham to Orchies | 133.11 mi (214.22 km) |
| Gillingham to Orleans | 248.17 mi (399.39 km) |
| Gillingham to Orly | 199.93 mi (321.76 km) |
| Gillingham to Ormesson-sur-Marne | 200.04 mi (321.93 km) |
| Gillingham to Orsay | 199.35 mi (320.82 km) |
