| Manage to Olympia Heights (Florida) | 4,636.18 mi (7,461.21 km) |
| Manage to Omaha (Nebraska) | 4,487.14 mi (7,221.35 km) |
| Manage to On Top of the World Designated Place (Florida) | 4,550.03 mi (7,322.57 km) |
| Manage to Onalaska (Wisconsin) | 4,184.50 mi (6,734.30 km) |
| Manage to Oneida (New York) | 3,628.61 mi (5,839.69 km) |
| Manage to Oneonta (New York) | 3,631.24 mi (5,843.92 km) |
| Manage to Ontario (California) | 5,606.86 mi (9,023.37 km) |
| Manage to Ontario (Oregon) | 5,015.18 mi (8,071.16 km) |
| Manage to Opa-locka (Florida) | 4,623.79 mi (7,441.27 km) |
| Manage to Opelika (Alabama) | 4,502.21 mi (7,245.60 km) |
| Manage to Opelousas (Louisiana) | 4,880.12 mi (7,853.79 km) |
| Manage to Orange (California) | 5,627.24 mi (9,056.16 km) |
| Manage to Orange (Texas) | 4,967.59 mi (7,994.57 km) |
| Manage to Orange City (Florida) | 4,516.48 mi (7,268.57 km) |
| Manage to Orangeburg (South Carolina) | 4,276.42 mi (6,882.23 km) |
