| Irthlingborough to Brezovica | 804.30 mi (1,294.39 km) |
| Irthlingborough to Cankova | 837.81 mi (1,348.32 km) |
| Irthlingborough to Celje | 827.68 mi (1,332.03 km) |
| Irthlingborough to Cerklje na Gorenjskem | 797.21 mi (1,282.99 km) |
| Irthlingborough to Cerknica | 811.74 mi (1,306.37 km) |
| Irthlingborough to Cerkno | 783.65 mi (1,261.17 km) |
| Irthlingborough to Cerkvenjak | 840.77 mi (1,353.09 km) |
| Irthlingborough to Cirkulane | 851.52 mi (1,370.38 km) |
| Irthlingborough to Crensovci | 854.23 mi (1,374.76 km) |
| Irthlingborough to Crna na Koroskem | 802.04 mi (1,290.75 km) |
| Irthlingborough to Crnomelj | 852.71 mi (1,372.30 km) |
| Irthlingborough to Destrnik | 841.19 mi (1,353.76 km) |
| Irthlingborough to Divaca | 802.38 mi (1,291.31 km) |
| Irthlingborough to Dobje | 836.63 mi (1,346.42 km) |
| Irthlingborough to Dobrna | 822.04 mi (1,322.95 km) |
