| Irthlingborough to Firestone (Colorado) | 4,611.96 mi (7,422.24 km) |
| Irthlingborough to Fish Hawk (Florida) | 4,376.44 mi (7,043.19 km) |
| Irthlingborough to Fishers (Indiana) | 3,930.56 mi (6,325.63 km) |
| Irthlingborough to Fitchburg (Massachusetts) | 3,254.73 mi (5,237.99 km) |
| Irthlingborough to Fitchburg (Wisconsin) | 3,918.08 mi (6,305.54 km) |
| Irthlingborough to Five Corners (Washington) | 4,843.59 mi (7,795.00 km) |
| Irthlingborough to Five Forks (South Carolina) | 4,030.41 mi (6,486.32 km) |
| Irthlingborough to Flagstaff (Arizona) | 5,107.14 mi (8,219.15 km) |
| Irthlingborough to Flat Rock (Michigan) | 3,727.17 mi (5,998.29 km) |
| Irthlingborough to Fleming Island (Florida) | 4,242.09 mi (6,826.99 km) |
| Irthlingborough to Flint (Michigan) | 3,701.15 mi (5,956.43 km) |
| Irthlingborough to Floral Park (New York) | 3,411.50 mi (5,490.27 km) |
| Irthlingborough to Florence (Alabama) | 4,246.09 mi (6,833.42 km) |
| Irthlingborough to Florence (Arizona) | 5,218.94 mi (8,399.08 km) |
| Irthlingborough to Florence (Kentucky) | 3,925.41 mi (6,317.34 km) |
