| Irthlingborough to Clermont (Florida) | 4,321.37 mi (6,954.58 km) |
| Irthlingborough to Cleveland (Mississippi) | 4,420.80 mi (7,114.58 km) |
| Irthlingborough to Cleveland (Ohio) | 3,694.06 mi (5,945.02 km) |
| Irthlingborough to Cleveland (Tennessee) | 4,118.03 mi (6,627.33 km) |
| Irthlingborough to Cleveland Heights (Ohio) | 3,687.92 mi (5,935.14 km) |
| Irthlingborough to Cliffside Park (New Jersey) | 3,418.60 mi (5,501.71 km) |
| Irthlingborough to Clifton (Colorado) | 4,788.05 mi (7,705.62 km) |
| Irthlingborough to Clifton (New Jersey) | 3,423.64 mi (5,509.81 km) |
| Irthlingborough to Clinton (Iowa) | 4,002.56 mi (6,441.50 km) |
| Irthlingborough to Clinton (Maryland) | 3,629.41 mi (5,840.97 km) |
| Irthlingborough to Clinton (Mississippi) | 4,476.17 mi (7,203.70 km) |
| Irthlingborough to Clinton (Utah) | 4,792.83 mi (7,713.32 km) |
| Irthlingborough to Clive (Iowa) | 4,144.43 mi (6,669.81 km) |
| Irthlingborough to Cloquet (Minnesota) | 3,853.44 mi (6,201.52 km) |
| Irthlingborough to Cloverleaf (Texas) | 4,798.44 mi (7,722.34 km) |
