| Lockport to Olympia Heights (Florida) | 1,180.86 mi (1,900.41 km) |
| Lockport to Omaha (Nebraska) | 416.14 mi (669.71 km) |
| Lockport to On Top of the World Designated Place (Florida) | 920.75 mi (1,481.80 km) |
| Lockport to Onalaska (Wisconsin) | 226.27 mi (364.15 km) |
| Lockport to Oneida (New York) | 639.35 mi (1,028.93 km) |
| Lockport to Oneonta (New York) | 667.37 mi (1,074.02 km) |
| Lockport to Ontario (California) | 1,686.98 mi (2,714.93 km) |
| Lockport to Ontario (Oregon) | 1,469.26 mi (2,364.54 km) |
| Lockport to Opa-locka (Florida) | 1,171.25 mi (1,884.94 km) |
| Lockport to Opelika (Alabama) | 633.93 mi (1,020.22 km) |
| Lockport to Opelousas (Louisiana) | 797.08 mi (1,282.78 km) |
| Lockport to Orange (California) | 1,705.36 mi (2,744.51 km) |
| Lockport to Orange (Texas) | 854.36 mi (1,374.96 km) |
| Lockport to Orange City (Florida) | 952.75 mi (1,533.30 km) |
| Lockport to Orangeburg (South Carolina) | 682.80 mi (1,098.87 km) |
