| Letchworth to Cernavoda | 1,394.46 mi (2,244.17 km) |
| Letchworth to Chitila | 1,302.73 mi (2,096.54 km) |
| Letchworth to Cisnadie | 1,183.12 mi (1,904.05 km) |
| Letchworth to Cluj-Napoca | 1,124.22 mi (1,809.26 km) |
| Letchworth to Codlea | 1,237.69 mi (1,991.87 km) |
| Letchworth to Comanesti | 1,255.72 mi (2,020.88 km) |
| Letchworth to Comarnic | 1,261.26 mi (2,029.80 km) |
| Letchworth to Constanta | 1,425.87 mi (2,294.72 km) |
| Letchworth to Corabia | 1,270.21 mi (2,044.21 km) |
| Letchworth to Costesti | 1,251.08 mi (2,013.41 km) |
| Letchworth to Covasna | 1,263.61 mi (2,033.58 km) |
| Letchworth to Craiova | 1,220.17 mi (1,963.68 km) |
| Letchworth to Cristuru Secuiesc | 1,200.58 mi (1,932.14 km) |
| Letchworth to Cugir | 1,145.81 mi (1,844.00 km) |
| Letchworth to Cumpana | 1,424.63 mi (2,292.73 km) |
