| Grays to Octeville | 154.29 mi (248.30 km) |
| Grays to Oignies | 135.11 mi (217.45 km) |
| Grays to Oissel | 151.15 mi (243.25 km) |
| Grays to Olivet | 259.18 mi (417.11 km) |
| Grays to Ollioules | 630.83 mi (1,015.22 km) |
| Grays to Olonne-sur-Mer | 354.26 mi (570.13 km) |
| Grays to Oloron-Sainte-Marie | 573.81 mi (923.46 km) |
| Grays to Onet Village | 502.20 mi (808.22 km) |
| Grays to Onnaing | 160.90 mi (258.94 km) |
| Grays to Orange | 547.62 mi (881.32 km) |
| Grays to Orchies | 144.38 mi (232.36 km) |
| Grays to Orleans | 256.71 mi (413.14 km) |
| Grays to Orly | 209.65 mi (337.40 km) |
| Grays to Ormesson-sur-Marne | 209.95 mi (337.89 km) |
| Grays to Orsay | 208.77 mi (335.99 km) |
