| Upminster to Cortona | 790.86 mi (1,272.76 km) |
| Upminster to Cosenza | 1,143.46 mi (1,840.21 km) |
| Upminster to Cossato | 549.13 mi (883.74 km) |
| Upminster to Costa Volpino | 597.58 mi (961.72 km) |
| Upminster to Creazzo | 659.90 mi (1,062.00 km) |
| Upminster to Crema | 607.05 mi (976.95 km) |
| Upminster to Cremona | 630.42 mi (1,014.56 km) |
| Upminster to Crevalcore | 688.47 mi (1,107.99 km) |
| Upminster to Crispiano | 1,106.52 mi (1,780.78 km) |
| Upminster to Crosia | 1,145.70 mi (1,843.82 km) |
| Upminster to Crotone | 1,183.53 mi (1,904.71 km) |
| Upminster to Cuneo | 599.00 mi (964.00 km) |
| Upminster to Cuorgne | 543.82 mi (875.19 km) |
| Upminster to Cusano Milanino | 581.49 mi (935.82 km) |
| Upminster to Cutro | 1,181.90 mi (1,902.08 km) |
