| Hereford to Oakley (California) | 5,215.39 mi (8,393.36 km) |
| Hereford to Oakton (Virginia) | 3,559.33 mi (5,728.19 km) |
| Hereford to Oakville (Missouri) | 4,097.46 mi (6,594.22 km) |
| Hereford to Oatfield (Oregon) | 4,817.20 mi (7,752.54 km) |
| Hereford to Ocala (Florida) | 4,223.32 mi (6,796.78 km) |
| Hereford to Ocean Acres (New Jersey) | 3,397.86 mi (5,468.33 km) |
| Hereford to Ocean City (New Jersey) | 3,432.02 mi (5,523.31 km) |
| Hereford to Ocean Pines (Maryland) | 3,493.92 mi (5,622.93 km) |
| Hereford to Ocean Pointe (Hawaii) | 7,152.71 mi (11,511.17 km) |
| Hereford to Ocean Springs (Mississippi) | 4,434.58 mi (7,136.76 km) |
| Hereford to Oceanside (California) | 5,348.25 mi (8,607.17 km) |
| Hereford to Oceanside (New York) | 3,332.66 mi (5,363.40 km) |
| Hereford to Ocoee (Florida) | 4,227.50 mi (6,803.51 km) |
| Hereford to Oconomowoc (Wisconsin) | 3,808.32 mi (6,128.89 km) |
| Hereford to Odenton (Maryland) | 3,526.58 mi (5,675.48 km) |
