| Sumter to Octeville | 4,006.15 mi (6,447.27 km) |
| Sumter to Oignies | 4,184.65 mi (6,734.54 km) |
| Sumter to Oissel | 4,129.19 mi (6,645.29 km) |
| Sumter to Olivet | 4,197.26 mi (6,754.84 km) |
| Sumter to Ollioules | 4,496.12 mi (7,235.81 km) |
| Sumter to Olonne-sur-Mer | 4,063.58 mi (6,539.70 km) |
| Sumter to Oloron-Sainte-Marie | 4,193.89 mi (6,749.41 km) |
| Sumter to Onet Village | 4,313.60 mi (6,942.06 km) |
| Sumter to Onnaing | 4,211.63 mi (6,777.97 km) |
| Sumter to Orange | 4,420.97 mi (7,114.87 km) |
| Sumter to Orchies | 4,194.95 mi (6,751.12 km) |
| Sumter to Orleans | 4,196.73 mi (6,753.99 km) |
| Sumter to Orly | 4,198.31 mi (6,756.53 km) |
| Sumter to Ormesson-sur-Marne | 4,203.60 mi (6,765.04 km) |
| Sumter to Orsay | 4,190.53 mi (6,744.01 km) |
