| Irthlingborough to Clarkston (Georgia) | 4,160.18 mi (6,695.17 km) |
| Irthlingborough to Clarksville (Indiana) | 4,000.99 mi (6,438.97 km) |
| Irthlingborough to Clarksville (Tennessee) | 4,147.51 mi (6,674.77 km) |
| Irthlingborough to Clawson (Michigan) | 3,702.56 mi (5,958.70 km) |
| Irthlingborough to Clay (Alabama) | 4,260.72 mi (6,856.96 km) |
| Irthlingborough to Clayton (California) | 5,274.83 mi (8,489.01 km) |
| Irthlingborough to Clayton (Missouri) | 4,160.98 mi (6,696.45 km) |
| Irthlingborough to Clayton (North Carolina) | 3,836.43 mi (6,174.14 km) |
| Irthlingborough to Clayton (Ohio) | 3,871.50 mi (6,230.57 km) |
| Irthlingborough to Clearfield (Utah) | 4,793.51 mi (7,714.41 km) |
| Irthlingborough to Clearlake (California) | 5,235.80 mi (8,426.21 km) |
| Irthlingborough to Clearwater (Florida) | 4,392.47 mi (7,069.00 km) |
| Irthlingborough to Cleburne (Texas) | 4,750.11 mi (7,644.57 km) |
| Irthlingborough to Clemmons (North Carolina) | 3,897.10 mi (6,271.78 km) |
| Irthlingborough to Clemson (South Carolina) | 4,059.98 mi (6,533.91 km) |
