| Huntsville to Octeville | 4,235.91 mi (6,817.04 km) |
| Huntsville to Oignies | 4,404.25 mi (7,087.96 km) |
| Huntsville to Oissel | 4,357.13 mi (7,012.12 km) |
| Huntsville to Olivet | 4,431.67 mi (7,132.09 km) |
| Huntsville to Ollioules | 4,746.94 mi (7,639.46 km) |
| Huntsville to Olonne-sur-Mer | 4,309.38 mi (6,935.27 km) |
| Huntsville to Oloron-Sainte-Marie | 4,453.98 mi (7,167.99 km) |
| Huntsville to Onet Village | 4,563.83 mi (7,344.77 km) |
| Huntsville to Onnaing | 4,430.87 mi (7,130.80 km) |
| Huntsville to Orange | 4,668.94 mi (7,513.93 km) |
| Huntsville to Orchies | 4,414.20 mi (7,103.96 km) |
| Huntsville to Orleans | 4,430.94 mi (7,130.91 km) |
| Huntsville to Orly | 4,427.63 mi (7,125.58 km) |
| Huntsville to Ormesson-sur-Marne | 4,432.50 mi (7,133.43 km) |
| Huntsville to Orsay | 4,420.35 mi (7,113.87 km) |
