| Olton to Benavente | 988.92 mi (1,591.50 km) |
| Olton to Bombarral | 975.02 mi (1,569.15 km) |
| Olton to Bougado | 829.75 mi (1,335.35 km) |
| Olton to Braga | 813.43 mi (1,309.09 km) |
| Olton to Braganca | 770.09 mi (1,239.35 km) |
| Olton to Cabeceiras de Basto | 807.56 mi (1,299.64 km) |
| Olton to Cacem | 1,010.23 mi (1,625.81 km) |
| Olton to Cadaval | 976.36 mi (1,571.30 km) |
| Olton to Caldas da Rainha | 965.58 mi (1,553.96 km) |
| Olton to Calheta | 1,562.83 mi (2,515.14 km) |
| Olton to Camara de Lobos | 1,560.19 mi (2,510.88 km) |
| Olton to Canico | 1,560.52 mi (2,511.41 km) |
| Olton to Cantanhede | 894.91 mi (1,440.23 km) |
| Olton to Carregal do Sal | 879.50 mi (1,415.42 km) |
| Olton to Cartaxo | 976.57 mi (1,571.64 km) |
