| Round Rock to Benavente | 4,875.70 mi (7,846.68 km) |
| Round Rock to Bombarral | 4,849.85 mi (7,805.08 km) |
| Round Rock to Bougado | 4,821.48 mi (7,759.42 km) |
| Round Rock to Braga | 4,822.24 mi (7,760.64 km) |
| Round Rock to Braganca | 4,893.51 mi (7,875.34 km) |
| Round Rock to Cabeceiras de Basto | 4,841.83 mi (7,792.17 km) |
| Round Rock to Cacem | 4,856.22 mi (7,815.34 km) |
| Round Rock to Cadaval | 4,853.53 mi (7,811.00 km) |
| Round Rock to Caldas da Rainha | 4,846.93 mi (7,800.39 km) |
| Round Rock to Calheta | 4,614.20 mi (7,425.84 km) |
| Round Rock to Camara de Lobos | 4,625.09 mi (7,443.36 km) |
| Round Rock to Canico | 4,633.38 mi (7,456.71 km) |
| Round Rock to Cantanhede | 4,847.14 mi (7,800.72 km) |
| Round Rock to Carregal do Sal | 4,873.31 mi (7,842.83 km) |
| Round Rock to Cartaxo | 4,871.36 mi (7,839.70 km) |
