| Sumter to Olivares | 4,062.02 mi (6,537.19 km) |
| Sumter to Olivenza | 3,982.94 mi (6,409.92 km) |
| Sumter to Olot | 4,365.80 mi (7,026.08 km) |
| Sumter to Onate | 4,111.99 mi (6,617.61 km) |
| Sumter to Onda | 4,292.15 mi (6,907.55 km) |
| Sumter to Onteniente | 4,305.47 mi (6,928.99 km) |
| Sumter to Orihuela | 4,308.32 mi (6,933.56 km) |
| Sumter to Osuna | 4,120.38 mi (6,631.10 km) |
| Sumter to Ourense | 3,864.78 mi (6,219.76 km) |
| Sumter to Oviedo | 3,941.17 mi (6,342.71 km) |
| Sumter to Paiporta | 4,298.69 mi (6,918.07 km) |
| Sumter to Pajara | 3,871.71 mi (6,230.91 km) |
| Sumter to Palafolls | 4,391.98 mi (7,068.22 km) |
| Sumter to Palafrugell | 4,404.78 mi (7,088.81 km) |
| Sumter to Palamos | 4,405.12 mi (7,089.35 km) |
