| Southwater to Olympia Heights (Florida) | 4,432.60 mi (7,133.58 km) |
| Southwater to Omaha (Nebraska) | 4,300.46 mi (6,920.93 km) |
| Southwater to On Top of the World Designated Place (Florida) | 4,347.23 mi (6,996.19 km) |
| Southwater to Onalaska (Wisconsin) | 3,996.86 mi (6,432.33 km) |
| Southwater to Oneida (New York) | 3,430.43 mi (5,520.74 km) |
| Southwater to Oneonta (New York) | 3,432.29 mi (5,523.73 km) |
| Southwater to Ontario (California) | 5,435.49 mi (8,747.58 km) |
| Southwater to Ontario (Oregon) | 4,855.08 mi (7,813.49 km) |
| Southwater to Opa-locka (Florida) | 4,420.21 mi (7,113.64 km) |
| Southwater to Opelika (Alabama) | 4,301.69 mi (6,922.91 km) |
| Southwater to Opelousas (Louisiana) | 4,681.66 mi (7,534.41 km) |
| Southwater to Orange (California) | 5,455.90 mi (8,780.43 km) |
| Southwater to Orange (Texas) | 4,769.84 mi (7,676.32 km) |
| Southwater to Orange City (Florida) | 4,313.43 mi (6,941.79 km) |
| Southwater to Orangeburg (South Carolina) | 4,074.63 mi (6,557.48 km) |
