| Small Heath to Olympia Heights (Florida) | 4,353.95 mi (7,007.00 km) |
| Small Heath to Omaha (Nebraska) | 4,193.73 mi (6,749.15 km) |
| Small Heath to On Top of the World Designated Place (Florida) | 4,262.58 mi (6,859.96 km) |
| Small Heath to Onalaska (Wisconsin) | 3,890.74 mi (6,261.54 km) |
| Small Heath to Oneida (New York) | 3,334.84 mi (5,366.91 km) |
| Small Heath to Oneonta (New York) | 3,337.94 mi (5,371.90 km) |
| Small Heath to Ontario (California) | 5,321.98 mi (8,564.90 km) |
| Small Heath to Ontario (Oregon) | 4,738.82 mi (7,626.39 km) |
| Small Heath to Opa-locka (Florida) | 4,341.45 mi (6,986.89 km) |
| Small Heath to Opelika (Alabama) | 4,210.21 mi (6,775.67 km) |
| Small Heath to Opelousas (Louisiana) | 4,586.39 mi (7,381.08 km) |
| Small Heath to Orange (California) | 5,342.38 mi (8,597.73 km) |
| Small Heath to Orange (Texas) | 4,673.51 mi (7,521.29 km) |
| Small Heath to Orange City (Florida) | 4,230.01 mi (6,807.55 km) |
| Small Heath to Orangeburg (South Carolina) | 3,986.37 mi (6,415.44 km) |
