| Cwmbran to Octeville | 152.45 mi (245.34 km) |
| Cwmbran to Oignies | 273.59 mi (440.31 km) |
| Cwmbran to Oissel | 241.11 mi (388.03 km) |
| Cwmbran to Olivet | 341.60 mi (549.75 km) |
| Cwmbran to Ollioules | 718.62 mi (1,156.51 km) |
| Cwmbran to Olonne-sur-Mer | 358.01 mi (576.16 km) |
| Cwmbran to Oloron-Sainte-Marie | 595.15 mi (957.81 km) |
| Cwmbran to Onet Village | 566.06 mi (910.98 km) |
| Cwmbran to Onnaing | 300.55 mi (483.69 km) |
| Cwmbran to Orange | 632.60 mi (1,018.08 km) |
| Cwmbran to Orchies | 283.86 mi (456.83 km) |
| Cwmbran to Orleans | 339.75 mi (546.77 km) |
| Cwmbran to Orly | 312.48 mi (502.89 km) |
| Cwmbran to Ormesson-sur-Marne | 315.52 mi (507.78 km) |
| Cwmbran to Orsay | 307.76 mi (495.30 km) |
