| Southwick to Olympia Heights (Florida) | 4,439.67 mi (7,144.96 km) |
| Southwick to Omaha (Nebraska) | 4,311.59 mi (6,938.83 km) |
| Southwick to On Top of the World Designated Place (Florida) | 4,355.12 mi (7,008.89 km) |
| Southwick to Onalaska (Wisconsin) | 4,007.89 mi (6,450.08 km) |
| Southwick to Oneida (New York) | 3,439.89 mi (5,535.97 km) |
| Southwick to Oneonta (New York) | 3,441.58 mi (5,538.68 km) |
| Southwick to Ontario (California) | 5,447.78 mi (8,767.36 km) |
| Southwick to Ontario (Oregon) | 4,867.94 mi (7,834.19 km) |
| Southwick to Opa-locka (Florida) | 4,427.30 mi (7,125.05 km) |
| Southwick to Opelika (Alabama) | 4,310.54 mi (6,937.15 km) |
| Southwick to Opelousas (Louisiana) | 4,691.04 mi (7,549.50 km) |
| Southwick to Orange (California) | 5,468.19 mi (8,800.20 km) |
| Southwick to Orange (Texas) | 4,779.37 mi (7,691.66 km) |
| Southwick to Orange City (Florida) | 4,321.16 mi (6,954.23 km) |
| Southwick to Orangeburg (South Carolina) | 4,083.03 mi (6,571.01 km) |
