| San Bernardino to Olympia (Washington) | 937.88 mi (1,509.36 km) |
| San Bernardino to Olympia Heights (Florida) | 2,274.53 mi (3,660.51 km) |
| San Bernardino to Omaha (Nebraska) | 1,256.90 mi (2,022.78 km) |
| San Bernardino to On Top of the World Designated Place (Florida) | 2,078.49 mi (3,345.00 km) |
| San Bernardino to Onalaska (Wisconsin) | 1,545.04 mi (2,486.49 km) |
| San Bernardino to Oneida (New York) | 2,305.39 mi (3,710.17 km) |
| San Bernardino to Oneonta (New York) | 2,335.13 mi (3,758.02 km) |
| San Bernardino to Ontario (California) | 19.21 mi (30.91 km) |
| San Bernardino to Ontario (Oregon) | 683.15 mi (1,099.42 km) |
| San Bernardino to Opa-locka (Florida) | 2,274.45 mi (3,660.37 km) |
| San Bernardino to Opelika (Alabama) | 1,836.41 mi (2,955.42 km) |
| San Bernardino to Opelousas (Louisiana) | 1,489.06 mi (2,396.41 km) |
| San Bernardino to Orange (California) | 38.19 mi (61.46 km) |
| San Bernardino to Orange (Texas) | 1,401.35 mi (2,255.25 km) |
| San Bernardino to Orange City (Florida) | 2,139.40 mi (3,443.03 km) |
