| Riom to Bombarral | 772.58 mi (1,243.34 km) |
| Riom to Bougado | 662.39 mi (1,066.01 km) |
| Riom to Braga | 648.49 mi (1,043.65 km) |
| Riom to Braganca | 566.56 mi (911.79 km) |
| Riom to Cabeceiras de Basto | 631.39 mi (1,016.13 km) |
| Riom to Cacem | 801.36 mi (1,289.67 km) |
| Riom to Cadaval | 771.88 mi (1,242.23 km) |
| Riom to Caldas da Rainha | 765.59 mi (1,232.10 km) |
| Riom to Calheta | 1,407.97 mi (2,265.91 km) |
| Riom to Camara de Lobos | 1,401.95 mi (2,256.22 km) |
| Riom to Canico | 1,399.56 mi (2,252.37 km) |
| Riom to Cantanhede | 702.80 mi (1,131.04 km) |
| Riom to Carregal do Sal | 674.28 mi (1,085.14 km) |
| Riom to Cartaxo | 762.86 mi (1,227.71 km) |
| Riom to Cascais | 808.97 mi (1,301.91 km) |
