| Brentwood to Octeville | 162.02 mi (260.75 km) |
| Brentwood to Oignies | 141.28 mi (227.36 km) |
| Brentwood to Oissel | 161.15 mi (259.35 km) |
| Brentwood to Olivet | 269.10 mi (433.08 km) |
| Brentwood to Ollioules | 640.30 mi (1,030.46 km) |
| Brentwood to Olonne-sur-Mer | 363.59 mi (585.15 km) |
| Brentwood to Oloron-Sainte-Marie | 583.71 mi (939.39 km) |
| Brentwood to Onet Village | 512.21 mi (824.32 km) |
| Brentwood to Onnaing | 166.55 mi (268.04 km) |
| Brentwood to Orange | 557.22 mi (896.76 km) |
| Brentwood to Orchies | 150.19 mi (241.71 km) |
| Brentwood to Orleans | 266.63 mi (429.09 km) |
| Brentwood to Orly | 219.12 mi (352.63 km) |
| Brentwood to Ormesson-sur-Marne | 219.30 mi (352.92 km) |
| Brentwood to Orsay | 218.39 mi (351.46 km) |
