| Houghton Regis to Octeville | 164.74 mi (265.12 km) |
| Houghton Regis to Oignies | 181.74 mi (292.49 km) |
| Houghton Regis to Oissel | 190.65 mi (306.83 km) |
| Houghton Regis to Olivet | 299.25 mi (481.59 km) |
| Houghton Regis to Ollioules | 673.99 mi (1,084.68 km) |
| Houghton Regis to Olonne-sur-Mer | 375.12 mi (603.69 km) |
| Houghton Regis to Oloron-Sainte-Marie | 601.79 mi (968.49 km) |
| Houghton Regis to Onet Village | 540.20 mi (869.36 km) |
| Houghton Regis to Onnaing | 207.10 mi (333.29 km) |
| Houghton Regis to Orange | 590.08 mi (949.65 km) |
| Houghton Regis to Orchies | 190.72 mi (306.94 km) |
| Houghton Regis to Orleans | 296.88 mi (477.79 km) |
| Houghton Regis to Orly | 253.39 mi (407.80 km) |
| Houghton Regis to Ormesson-sur-Marne | 254.22 mi (409.13 km) |
| Houghton Regis to Orsay | 251.73 mi (405.12 km) |
