| Fort Carson to Octeville | 4,753.63 mi (7,650.23 km) |
| Fort Carson to Oignies | 4,883.73 mi (7,859.61 km) |
| Fort Carson to Oissel | 4,864.21 mi (7,828.19 km) |
| Fort Carson to Olivet | 4,955.84 mi (7,975.65 km) |
| Fort Carson to Ollioules | 5,311.45 mi (8,547.95 km) |
| Fort Carson to Olonne-sur-Mer | 4,873.81 mi (7,843.63 km) |
| Fort Carson to Oloron-Sainte-Marie | 5,058.46 mi (8,140.80 km) |
| Fort Carson to Onet Village | 5,132.89 mi (8,260.59 km) |
| Fort Carson to Onnaing | 4,908.11 mi (7,898.84 km) |
| Fort Carson to Orange | 5,227.02 mi (8,412.08 km) |
| Fort Carson to Orchies | 4,892.17 mi (7,873.18 km) |
| Fort Carson to Orleans | 4,954.50 mi (7,973.50 km) |
| Fort Carson to Orly | 4,936.12 mi (7,943.91 km) |
| Fort Carson to Ormesson-sur-Marne | 4,939.54 mi (7,949.41 km) |
| Fort Carson to Orsay | 4,930.70 mi (7,935.20 km) |
