| Hereford to Orangevale (California) | 5,161.19 mi (8,306.13 km) |
| Hereford to Orchards (Washington) | 4,799.75 mi (7,724.45 km) |
| Hereford to Orcutt (California) | 5,355.32 mi (8,618.56 km) |
| Hereford to Oregon (Ohio) | 3,679.64 mi (5,921.81 km) |
| Hereford to Oregon (Wisconsin) | 3,850.02 mi (6,196.01 km) |
| Hereford to Oregon City (Oregon) | 4,821.18 mi (7,758.94 km) |
| Hereford to Orem (Utah) | 4,771.15 mi (7,678.42 km) |
| Hereford to Orinda (California) | 5,236.44 mi (8,427.24 km) |
| Hereford to Orland Park (Illinois) | 3,853.12 mi (6,200.99 km) |
| Hereford to Orlando (Florida) | 4,224.43 mi (6,798.56 km) |
| Hereford to Ormond Beach (Florida) | 4,173.55 mi (6,716.67 km) |
| Hereford to Oro Valley (Arizona) | 5,176.49 mi (8,330.76 km) |
| Hereford to Oroville (California) | 5,125.00 mi (8,247.89 km) |
| Hereford to Oshkosh (Wisconsin) | 3,768.66 mi (6,065.08 km) |
| Hereford to Oskaloosa (Iowa) | 4,048.85 mi (6,515.99 km) |
