| Colonia to Olympia Heights (Florida) | 1,084.07 mi (1,744.64 km) |
| Colonia to Omaha (Nebraska) | 1,132.77 mi (1,823.01 km) |
| Colonia to On Top of the World Designated Place (Florida) | 912.37 mi (1,468.32 km) |
| Colonia to Onalaska (Wisconsin) | 891.82 mi (1,435.24 km) |
| Colonia to Oneida (New York) | 185.13 mi (297.93 km) |
| Colonia to Oneonta (New York) | 134.43 mi (216.35 km) |
| Colonia to Ontario (California) | 2,396.92 mi (3,857.48 km) |
| Colonia to Ontario (Oregon) | 2,168.24 mi (3,489.45 km) |
| Colonia to Opa-locka (Florida) | 1,070.94 mi (1,723.50 km) |
| Colonia to Opelika (Alabama) | 821.31 mi (1,321.77 km) |
| Colonia to Opelousas (Louisiana) | 1,213.22 mi (1,952.49 km) |
| Colonia to Orange (California) | 2,414.82 mi (3,886.28 km) |
| Colonia to Orange (Texas) | 1,308.33 mi (2,105.55 km) |
| Colonia to Orange City (Florida) | 896.70 mi (1,443.10 km) |
| Colonia to Orangeburg (South Carolina) | 608.86 mi (979.87 km) |
