| Belfast to Castelfidardo | 1,163.43 mi (1,872.37 km) |
| Belfast to Castelfiorentino | 1,072.46 mi (1,725.96 km) |
| Belfast to Castelfranco di Sopra | 1,089.99 mi (1,754.17 km) |
| Belfast to Castelfranco di Sotto | 1,060.28 mi (1,706.35 km) |
| Belfast to Castelfranco Emilia | 1,022.64 mi (1,645.78 km) |
| Belfast to Castelfranco Veneto | 998.46 mi (1,606.87 km) |
| Belfast to Castellabate | 1,379.38 mi (2,219.89 km) |
| Belfast to Castellammare del Golfo | 1,445.23 mi (2,325.88 km) |
| Belfast to Castellammare di Stabia | 1,341.48 mi (2,158.90 km) |
| Belfast to Castellamonte | 876.01 mi (1,409.80 km) |
| Belfast to Castellana Grotte | 1,419.64 mi (2,284.69 km) |
| Belfast to Castellaneta | 1,425.00 mi (2,293.32 km) |
| Belfast to Castellanza | 900.40 mi (1,449.05 km) |
| Belfast to Castellarano | 1,015.45 mi (1,634.21 km) |
| Belfast to Castelleone | 944.60 mi (1,520.19 km) |
