| Sumter to Oakleaf Plantation (Florida) | 273.81 mi (440.66 km) |
| Sumter to Oakley (California) | 2,307.68 mi (3,713.85 km) |
| Sumter to Oakton (Virginia) | 382.68 mi (615.86 km) |
| Sumter to Oakville (Missouri) | 634.63 mi (1,021.34 km) |
| Sumter to Oatfield (Oregon) | 2,349.04 mi (3,780.42 km) |
| Sumter to Ocala (Florida) | 344.85 mi (554.98 km) |
| Sumter to Ocean Acres (New Jersey) | 524.16 mi (843.55 km) |
| Sumter to Ocean City (New Jersey) | 488.38 mi (785.96 km) |
| Sumter to Ocean Pines (Maryland) | 424.04 mi (682.42 km) |
| Sumter to Ocean Pointe (Hawaii) | 4,724.67 mi (7,603.63 km) |
| Sumter to Ocean Springs (Mississippi) | 547.88 mi (881.72 km) |
| Sumter to Oceanside (California) | 2,113.88 mi (3,401.96 km) |
| Sumter to Oceanside (New York) | 592.75 mi (953.95 km) |
| Sumter to Ocoee (Florida) | 376.38 mi (605.72 km) |
| Sumter to Oconomowoc (Wisconsin) | 768.83 mi (1,237.31 km) |
