| Irthlingborough to Frederick (Maryland) | 3,618.56 mi (5,823.51 km) |
| Irthlingborough to Fredericksburg (Texas) | 4,916.08 mi (7,911.67 km) |
| Irthlingborough to Fredericksburg (Virginia) | 3,673.57 mi (5,912.04 km) |
| Irthlingborough to Frederickson (Washington) | 4,757.25 mi (7,656.06 km) |
| Irthlingborough to Freeport (Illinois) | 3,958.80 mi (6,371.07 km) |
| Irthlingborough to Freeport (New York) | 3,409.88 mi (5,487.67 km) |
| Irthlingborough to Freeport (Texas) | 4,850.08 mi (7,805.45 km) |
| Irthlingborough to Fremont (California) | 5,300.54 mi (8,530.40 km) |
| Irthlingborough to Fremont (Nebraska) | 4,250.23 mi (6,840.09 km) |
| Irthlingborough to Fremont (Ohio) | 3,755.32 mi (6,043.61 km) |
| Irthlingborough to French Valley (California) | 5,377.16 mi (8,653.71 km) |
| Irthlingborough to Fresno (California) | 5,278.23 mi (8,494.50 km) |
| Irthlingborough to Fresno (Texas) | 4,823.29 mi (7,762.34 km) |
| Irthlingborough to Fridley (Minnesota) | 3,957.53 mi (6,369.03 km) |
| Irthlingborough to Friendly (Maryland) | 3,631.27 mi (5,843.97 km) |
