| Hartsville to Octeville | 4,137.09 mi (6,658.00 km) |
| Hartsville to Oignies | 4,302.89 mi (6,924.83 km) |
| Hartsville to Oissel | 4,257.74 mi (6,852.17 km) |
| Hartsville to Olivet | 4,333.81 mi (6,974.60 km) |
| Hartsville to Ollioules | 4,653.21 mi (7,488.62 km) |
| Hartsville to Olonne-sur-Mer | 4,214.66 mi (6,782.84 km) |
| Hartsville to Oloron-Sainte-Marie | 4,363.33 mi (7,022.10 km) |
| Hartsville to Onet Village | 4,470.10 mi (7,193.94 km) |
| Hartsville to Onnaing | 4,329.40 mi (6,967.50 km) |
| Hartsville to Orange | 4,574.47 mi (7,361.90 km) |
| Hartsville to Orchies | 4,312.74 mi (6,940.69 km) |
| Hartsville to Orleans | 4,333.03 mi (6,973.34 km) |
| Hartsville to Orly | 4,328.51 mi (6,966.06 km) |
| Hartsville to Ormesson-sur-Marne | 4,333.28 mi (6,973.75 km) |
| Hartsville to Orsay | 4,321.36 mi (6,954.56 km) |
