| Horsforth to Odessa (Texas) | 4,873.02 mi (7,842.37 km) |
| Horsforth to Ogden (Utah) | 4,684.14 mi (7,538.40 km) |
| Horsforth to Oildale (California) | 5,231.04 mi (8,418.54 km) |
| Horsforth to Ojus (Florida) | 4,330.68 mi (6,969.56 km) |
| Horsforth to Okemos (Michigan) | 3,660.36 mi (5,890.78 km) |
| Horsforth to Oklahoma City (Oklahoma) | 4,505.56 mi (7,250.99 km) |
| Horsforth to Okmulgee (Oklahoma) | 4,442.85 mi (7,150.08 km) |
| Horsforth to Olathe (Kansas) | 4,230.38 mi (6,808.13 km) |
| Horsforth to Old Jamestown (Missouri) | 4,066.46 mi (6,544.34 km) |
| Horsforth to Oldsmar (Florida) | 4,322.21 mi (6,955.93 km) |
| Horsforth to Olean (New York) | 3,463.06 mi (5,573.25 km) |
| Horsforth to Olive Branch (Mississippi) | 4,246.44 mi (6,833.99 km) |
| Horsforth to Olivehurst (California) | 5,092.81 mi (8,196.09 km) |
| Horsforth to Olney (Maryland) | 3,546.66 mi (5,707.80 km) |
| Horsforth to Olympia (Washington) | 4,665.76 mi (7,508.82 km) |
