| Sumter to Opole | 4,778.78 mi (7,690.70 km) |
| Sumter to Orzesze | 4,827.52 mi (7,769.14 km) |
| Sumter to Osowa | 4,676.35 mi (7,525.85 km) |
| Sumter to Ostroda | 4,753.56 mi (7,650.12 km) |
| Sumter to Ostroleka | 4,832.50 mi (7,777.16 km) |
| Sumter to Ostrow Mazowiecka | 4,853.80 mi (7,811.43 km) |
| Sumter to Ostrow Wielkopolski | 4,742.08 mi (7,631.64 km) |
| Sumter to Ostrowiec Swietokrzyski | 4,901.21 mi (7,887.74 km) |
| Sumter to Ostrzeszow | 4,754.11 mi (7,651.00 km) |
| Sumter to Oswiecim | 4,849.52 mi (7,804.54 km) |
| Sumter to Otwock | 4,854.72 mi (7,812.92 km) |
| Sumter to Ozarow Mazowiecki | 4,834.15 mi (7,779.81 km) |
| Sumter to Ozimek | 4,789.32 mi (7,707.67 km) |
| Sumter to Ozorkow | 4,786.61 mi (7,703.31 km) |
| Sumter to Pabianice | 4,800.99 mi (7,726.45 km) |
