| Irthlingborough to Culpeper (Virginia) | 3,686.31 mi (5,932.55 km) |
| Irthlingborough to Culver City (California) | 5,395.04 mi (8,682.48 km) |
| Irthlingborough to Cumberland (Maryland) | 3,662.34 mi (5,893.96 km) |
| Irthlingborough to Cupertino (California) | 5,314.61 mi (8,553.04 km) |
| Irthlingborough to Cutler Bay (Florida) | 4,414.51 mi (7,104.47 km) |
| Irthlingborough to Cutlerville (Michigan) | 3,784.68 mi (6,090.86 km) |
| Irthlingborough to Cuyahoga Falls (Ohio) | 3,702.09 mi (5,957.94 km) |
| Irthlingborough to Cypress (California) | 5,394.53 mi (8,681.66 km) |
| Irthlingborough to Cypress Gardens (Florida) | 4,346.74 mi (6,995.40 km) |
| Irthlingborough to Cypress Lake (Florida) | 4,430.29 mi (7,129.86 km) |
| Irthlingborough to D'Iberville (Mississippi) | 4,515.11 mi (7,266.36 km) |
| Irthlingborough to Dakota Ridge (Colorado) | 4,646.70 mi (7,478.14 km) |
| Irthlingborough to Dale City (Virginia) | 3,651.83 mi (5,877.06 km) |
| Irthlingborough to Dallas (Georgia) | 4,179.20 mi (6,725.77 km) |
| Irthlingborough to Dallas (Oregon) | 4,907.56 mi (7,897.95 km) |
