| Irthlingborough to Cookeville (Tennessee) | 4,096.17 mi (6,592.15 km) |
| Irthlingborough to Coolidge (Arizona) | 5,229.36 mi (8,415.84 km) |
| Irthlingborough to Coon Rapids (Minnesota) | 3,954.95 mi (6,364.88 km) |
| Irthlingborough to Cooper City (Florida) | 4,388.38 mi (7,062.41 km) |
| Irthlingborough to Coos Bay (Oregon) | 5,021.96 mi (8,082.06 km) |
| Irthlingborough to Copiague (New York) | 3,401.24 mi (5,473.77 km) |
| Irthlingborough to Coppell (Texas) | 4,702.21 mi (7,567.47 km) |
| Irthlingborough to Copperas Cove (Texas) | 4,834.23 mi (7,779.93 km) |
| Irthlingborough to Coral Gables (Florida) | 4,405.31 mi (7,089.66 km) |
| Irthlingborough to Coral Springs (Florida) | 4,375.79 mi (7,042.16 km) |
| Irthlingborough to Coral Terrace (Florida) | 4,404.52 mi (7,088.38 km) |
| Irthlingborough to Coralville (Iowa) | 4,059.67 mi (6,533.40 km) |
| Irthlingborough to Coram (New York) | 3,376.40 mi (5,433.78 km) |
| Irthlingborough to Corcoran (California) | 5,311.49 mi (8,548.02 km) |
| Irthlingborough to Cordele (Georgia) | 4,233.22 mi (6,812.72 km) |
