| Calhoun to Octeville | 4,174.13 mi (6,717.61 km) |
| Calhoun to Oignies | 4,345.33 mi (6,993.13 km) |
| Calhoun to Oissel | 4,295.92 mi (6,913.61 km) |
| Calhoun to Olivet | 4,368.75 mi (7,030.83 km) |
| Calhoun to Ollioules | 4,679.73 mi (7,531.30 km) |
| Calhoun to Olonne-sur-Mer | 4,243.30 mi (6,828.93 km) |
| Calhoun to Oloron-Sainte-Marie | 4,384.11 mi (7,055.54 km) |
| Calhoun to Onet Village | 4,496.69 mi (7,236.72 km) |
| Calhoun to Onnaing | 4,372.07 mi (7,036.16 km) |
| Calhoun to Orange | 4,602.47 mi (7,406.96 km) |
| Calhoun to Orchies | 4,355.38 mi (7,009.30 km) |
| Calhoun to Orleans | 4,368.08 mi (7,029.74 km) |
| Calhoun to Orly | 4,366.09 mi (7,026.54 km) |
| Calhoun to Ormesson-sur-Marne | 4,371.08 mi (7,034.57 km) |
| Calhoun to Orsay | 4,358.67 mi (7,014.60 km) |
