| Portimao to Castelfidardo | 1,238.54 mi (1,993.24 km) |
| Portimao to Castelfiorentino | 1,116.18 mi (1,796.31 km) |
| Portimao to Castelfranco di Sopra | 1,145.01 mi (1,842.72 km) |
| Portimao to Castelfranco di Sotto | 1,107.88 mi (1,782.96 km) |
| Portimao to Castelfranco Emilia | 1,142.06 mi (1,837.98 km) |
| Portimao to Castelfranco Veneto | 1,208.63 mi (1,945.10 km) |
| Portimao to Castellabate | 1,281.12 mi (2,061.76 km) |
| Portimao to Castellammare del Golfo | 1,171.82 mi (1,885.86 km) |
| Portimao to Castellammare di Stabia | 1,257.82 mi (2,024.26 km) |
| Portimao to Castellamonte | 1,015.27 mi (1,633.93 km) |
| Portimao to Castellana Grotte | 1,398.84 mi (2,251.21 km) |
| Portimao to Castellaneta | 1,386.02 mi (2,230.59 km) |
| Portimao to Castellanza | 1,073.75 mi (1,728.04 km) |
| Portimao to Castellarano | 1,128.90 mi (1,816.79 km) |
| Portimao to Castelleone | 1,101.79 mi (1,773.15 km) |
