| Sumter to Nasaud | 5,150.73 mi (8,289.30 km) |
| Sumter to Navodari | 5,434.28 mi (8,745.63 km) |
| Sumter to Negresti-Oas | 5,090.22 mi (8,191.92 km) |
| Sumter to Nehoiu | 5,300.89 mi (8,530.96 km) |
| Sumter to Ocna Mures | 5,163.37 mi (8,309.64 km) |
| Sumter to Odobesti | 5,314.32 mi (8,552.58 km) |
| Sumter to Odorheiu Secuiesc | 5,223.31 mi (8,406.11 km) |
| Sumter to Oltenita | 5,364.94 mi (8,634.04 km) |
| Sumter to Onesti | 5,282.96 mi (8,502.10 km) |
| Sumter to Oradea | 5,060.67 mi (8,144.36 km) |
| Sumter to Orastie | 5,157.52 mi (8,300.22 km) |
| Sumter to Oravita | 5,126.24 mi (8,249.88 km) |
| Sumter to Orsova | 5,167.28 mi (8,315.93 km) |
| Sumter to Otelu Rosu | 5,135.72 mi (8,265.14 km) |
| Sumter to Otopeni | 5,323.55 mi (8,567.43 km) |
