| Didcot to Collegno | 605.20 mi (973.98 km) |
| Didcot to Cologno al Serio | 649.30 mi (1,044.94 km) |
| Didcot to Cologno Monzese | 637.36 mi (1,025.73 km) |
| Didcot to Colorno | 704.47 mi (1,133.73 km) |
| Didcot to Comacchio | 779.37 mi (1,254.27 km) |
| Didcot to Comiso | 1,274.61 mi (2,051.29 km) |
| Didcot to Como | 617.09 mi (993.11 km) |
| Didcot to Concordia Sagittaria | 756.95 mi (1,218.20 km) |
| Didcot to Concorezzo | 636.36 mi (1,024.13 km) |
| Didcot to Conegliano | 730.79 mi (1,176.09 km) |
| Didcot to Conselice | 775.47 mi (1,248.00 km) |
| Didcot to Conselve | 743.28 mi (1,196.20 km) |
| Didcot to Conversano | 1,138.32 mi (1,831.95 km) |
| Didcot to Copertino | 1,207.09 mi (1,942.63 km) |
| Didcot to Copparo | 757.38 mi (1,218.89 km) |
