| Reading to Octeville | 129.64 mi (208.63 km) |
| Reading to Oignies | 185.52 mi (298.57 km) |
| Reading to Oissel | 171.94 mi (276.71 km) |
| Reading to Olivet | 279.33 mi (449.54 km) |
| Reading to Ollioules | 656.74 mi (1,056.91 km) |
| Reading to Olonne-sur-Mer | 341.73 mi (549.96 km) |
| Reading to Oloron-Sainte-Marie | 570.97 mi (918.88 km) |
| Reading to Onet Village | 516.72 mi (831.58 km) |
| Reading to Onnaing | 212.25 mi (341.59 km) |
| Reading to Orange | 571.89 mi (920.38 km) |
| Reading to Orchies | 195.56 mi (314.73 km) |
| Reading to Orleans | 277.12 mi (445.98 km) |
| Reading to Orly | 239.37 mi (385.22 km) |
| Reading to Ormesson-sur-Marne | 241.17 mi (388.13 km) |
| Reading to Orsay | 236.39 mi (380.44 km) |
