| Didcot to Cortona | 842.31 mi (1,355.56 km) |
| Didcot to Cosenza | 1,194.76 mi (1,922.79 km) |
| Didcot to Cossato | 598.27 mi (962.83 km) |
| Didcot to Costa Volpino | 651.82 mi (1,049.00 km) |
| Didcot to Creazzo | 715.66 mi (1,151.74 km) |
| Didcot to Crema | 659.17 mi (1,060.82 km) |
| Didcot to Cremona | 682.61 mi (1,098.55 km) |
| Didcot to Crevalcore | 741.71 mi (1,193.67 km) |
| Didcot to Crispiano | 1,160.95 mi (1,868.37 km) |
| Didcot to Crosia | 1,198.09 mi (1,928.14 km) |
| Didcot to Crotone | 1,235.72 mi (1,988.70 km) |
| Didcot to Cuneo | 642.69 mi (1,034.31 km) |
| Didcot to Cuorgne | 590.93 mi (951.01 km) |
| Didcot to Cusano Milanino | 633.07 mi (1,018.82 km) |
| Didcot to Cutro | 1,233.84 mi (1,985.67 km) |
