| Leander to Olympia Heights (Florida) | 1,117.41 mi (1,798.29 km) |
| Leander to Omaha (Nebraska) | 745.45 mi (1,199.69 km) |
| Leander to On Top of the World Designated Place (Florida) | 938.20 mi (1,509.88 km) |
| Leander to Onalaska (Wisconsin) | 989.30 mi (1,592.13 km) |
| Leander to Oneida (New York) | 1,493.64 mi (2,403.78 km) |
| Leander to Oneonta (New York) | 1,501.20 mi (2,415.94 km) |
| Leander to Ontario (California) | 1,175.67 mi (1,892.06 km) |
| Leander to Ontario (Oregon) | 1,396.41 mi (2,247.30 km) |
| Leander to Opa-locka (Florida) | 1,117.88 mi (1,799.06 km) |
| Leander to Opelika (Alabama) | 748.14 mi (1,204.02 km) |
| Leander to Opelousas (Louisiana) | 343.92 mi (553.48 km) |
| Leander to Orange (California) | 1,186.30 mi (1,909.17 km) |
| Leander to Orange (Texas) | 246.49 mi (396.68 km) |
| Leander to Orange City (Florida) | 999.67 mi (1,608.81 km) |
| Leander to Orangeburg (South Carolina) | 1,014.44 mi (1,632.58 km) |
