| Irthlingborough to Corinth (Mississippi) | 4,273.63 mi (6,877.75 km) |
| Irthlingborough to Corinth (Texas) | 4,695.79 mi (7,557.15 km) |
| Irthlingborough to Cornelius (North Carolina) | 3,943.93 mi (6,347.14 km) |
| Irthlingborough to Cornelius (Oregon) | 4,866.05 mi (7,831.15 km) |
| Irthlingborough to Corning (New York) | 3,482.72 mi (5,604.89 km) |
| Irthlingborough to Corona (California) | 5,376.86 mi (8,653.22 km) |
| Irthlingborough to Coronado (California) | 5,432.47 mi (8,742.72 km) |
| Irthlingborough to Corpus Christi (Texas) | 4,993.45 mi (8,036.18 km) |
| Irthlingborough to Corsicana (Texas) | 4,728.30 mi (7,609.46 km) |
| Irthlingborough to Cortland (New York) | 3,428.21 mi (5,517.17 km) |
| Irthlingborough to Corvallis (Oregon) | 4,927.05 mi (7,929.32 km) |
| Irthlingborough to Coshocton (Ohio) | 3,756.36 mi (6,045.28 km) |
| Irthlingborough to Costa Mesa (California) | 5,399.19 mi (8,689.16 km) |
| Irthlingborough to Coto de Caza (California) | 5,392.78 mi (8,678.85 km) |
| Irthlingborough to Cottage Grove (Minnesota) | 3,958.48 mi (6,370.56 km) |
