| Irthlingborough to Foothill Farms (California) | 5,214.37 mi (8,391.72 km) |
| Irthlingborough to Fords (New Jersey) | 3,444.33 mi (5,543.12 km) |
| Irthlingborough to Forest (Virginia) | 3,789.09 mi (6,097.95 km) |
| Irthlingborough to Forest Acres (South Carolina) | 4,017.30 mi (6,465.22 km) |
| Irthlingborough to Forest City (Florida) | 4,303.41 mi (6,925.67 km) |
| Irthlingborough to Forest Grove (Oregon) | 4,867.29 mi (7,833.14 km) |
| Irthlingborough to Forest Hill (Texas) | 4,728.47 mi (7,609.74 km) |
| Irthlingborough to Forest Hills (Michigan) | 3,772.34 mi (6,070.99 km) |
| Irthlingborough to Forest Lake (Minnesota) | 3,938.82 mi (6,338.91 km) |
| Irthlingborough to Forest Park (Georgia) | 4,174.38 mi (6,718.01 km) |
| Irthlingborough to Forest Park (Illinois) | 3,910.73 mi (6,293.71 km) |
| Irthlingborough to Forest Park (Ohio) | 3,906.64 mi (6,287.13 km) |
| Irthlingborough to Forestville (Maryland) | 3,623.31 mi (5,831.15 km) |
| Irthlingborough to Forestville (Ohio) | 3,909.54 mi (6,291.79 km) |
| Irthlingborough to Forney (Texas) | 4,693.24 mi (7,553.03 km) |
