| Irthlingborough to Cloverly (Maryland) | 3,616.85 mi (5,820.75 km) |
| Irthlingborough to Clovis (California) | 5,272.28 mi (8,484.91 km) |
| Irthlingborough to Clovis (New Mexico) | 4,854.24 mi (7,812.14 km) |
| Irthlingborough to Clute (Texas) | 4,847.31 mi (7,801.00 km) |
| Irthlingborough to Coachella (California) | 5,340.80 mi (8,595.19 km) |
| Irthlingborough to Coalinga (California) | 5,331.43 mi (8,580.10 km) |
| Irthlingborough to Coamo (Puerto Rico) | 4,217.33 mi (6,787.14 km) |
| Irthlingborough to Coatesville (Pennsylvania) | 3,529.60 mi (5,680.34 km) |
| Irthlingborough to Cockeysville (Maryland) | 3,584.93 mi (5,769.39 km) |
| Irthlingborough to Cocoa (Florida) | 4,289.55 mi (6,903.37 km) |
| Irthlingborough to Cocoa Beach (Florida) | 4,286.24 mi (6,898.04 km) |
| Irthlingborough to Coconut Creek (Florida) | 4,372.15 mi (7,036.30 km) |
| Irthlingborough to Coeur d'Alene (Idaho) | 4,572.12 mi (7,358.11 km) |
| Irthlingborough to Cohoes (New York) | 3,322.70 mi (5,347.37 km) |
| Irthlingborough to Cold Springs (Nevada) | 5,116.02 mi (8,233.43 km) |
