| Brigham City to Olympia Heights (Florida) | 2,107.43 mi (3,391.58 km) |
| Brigham City to Omaha (Nebraska) | 828.05 mi (1,332.61 km) |
| Brigham City to On Top of the World Designated Place (Florida) | 1,870.90 mi (3,010.93 km) |
| Brigham City to Onalaska (Wisconsin) | 1,067.98 mi (1,718.75 km) |
| Brigham City to Oneida (New York) | 1,848.16 mi (2,974.33 km) |
| Brigham City to Oneonta (New York) | 1,885.35 mi (3,034.18 km) |
| Brigham City to Ontario (California) | 598.19 mi (962.69 km) |
| Brigham City to Ontario (Oregon) | 304.75 mi (490.45 km) |
| Brigham City to Opa-locka (Florida) | 2,103.83 mi (3,385.79 km) |
| Brigham City to Opelika (Alabama) | 1,583.69 mi (2,548.70 km) |
| Brigham City to Opelousas (Louisiana) | 1,343.85 mi (2,162.72 km) |
| Brigham City to Orange (California) | 618.40 mi (995.22 km) |
| Brigham City to Orange (Texas) | 1,286.84 mi (2,070.98 km) |
| Brigham City to Orange City (Florida) | 1,927.04 mi (3,101.26 km) |
| Brigham City to Orangeburg (South Carolina) | 1,785.22 mi (2,873.04 km) |
