| Irthlingborough to Cernavoda | 1,415.09 mi (2,277.37 km) |
| Irthlingborough to Chitila | 1,324.03 mi (2,130.82 km) |
| Irthlingborough to Cisnadie | 1,204.05 mi (1,937.73 km) |
| Irthlingborough to Cluj-Napoca | 1,144.25 mi (1,841.50 km) |
| Irthlingborough to Codlea | 1,258.09 mi (2,024.71 km) |
| Irthlingborough to Comanesti | 1,274.97 mi (2,051.87 km) |
| Irthlingborough to Comarnic | 1,282.02 mi (2,063.22 km) |
| Irthlingborough to Constanta | 1,446.41 mi (2,327.77 km) |
| Irthlingborough to Corabia | 1,292.75 mi (2,080.47 km) |
| Irthlingborough to Costesti | 1,272.69 mi (2,048.19 km) |
| Irthlingborough to Covasna | 1,283.57 mi (2,065.70 km) |
| Irthlingborough to Craiova | 1,242.53 mi (1,999.65 km) |
| Irthlingborough to Cristuru Secuiesc | 1,220.54 mi (1,964.26 km) |
| Irthlingborough to Cugir | 1,166.93 mi (1,877.99 km) |
| Irthlingborough to Cumpana | 1,445.25 mi (2,325.90 km) |
