| Keystone to Octeville | 4,375.06 mi (7,040.98 km) |
| Keystone to Oignies | 4,559.97 mi (7,338.56 km) |
| Keystone to Oissel | 4,498.93 mi (7,240.33 km) |
| Keystone to Olivet | 4,561.89 mi (7,341.65 km) |
| Keystone to Ollioules | 4,845.73 mi (7,798.44 km) |
| Keystone to Olonne-sur-Mer | 4,419.56 mi (7,112.59 km) |
| Keystone to Oloron-Sainte-Marie | 4,536.12 mi (7,300.18 km) |
| Keystone to Onet Village | 4,664.55 mi (7,506.86 km) |
| Keystone to Onnaing | 4,587.10 mi (7,382.22 km) |
| Keystone to Orange | 4,773.46 mi (7,682.14 km) |
| Keystone to Orchies | 4,570.47 mi (7,355.46 km) |
| Keystone to Orleans | 4,561.52 mi (7,341.06 km) |
| Keystone to Orly | 4,566.77 mi (7,349.50 km) |
| Keystone to Ormesson-sur-Marne | 4,572.33 mi (7,358.46 km) |
| Keystone to Orsay | 4,558.65 mi (7,336.43 km) |
