| Birstonas to Bombarral | 1,862.97 mi (2,998.16 km) |
| Birstonas to Bougado | 1,740.66 mi (2,801.33 km) |
| Birstonas to Braga | 1,725.37 mi (2,776.72 km) |
| Birstonas to Braganca | 1,650.42 mi (2,656.09 km) |
| Birstonas to Cabeceiras de Basto | 1,710.85 mi (2,753.34 km) |
| Birstonas to Cacem | 1,893.39 mi (3,047.12 km) |
| Birstonas to Cadaval | 1,862.62 mi (2,997.60 km) |
| Birstonas to Caldas da Rainha | 1,855.38 mi (2,985.95 km) |
| Birstonas to Calheta | 2,498.13 mi (4,020.35 km) |
| Birstonas to Camara de Lobos | 2,492.69 mi (4,011.60 km) |
| Birstonas to Canico | 2,490.76 mi (4,008.49 km) |
| Birstonas to Cantanhede | 1,789.23 mi (2,879.49 km) |
| Birstonas to Carregal do Sal | 1,762.69 mi (2,836.78 km) |
| Birstonas to Cartaxo | 1,854.94 mi (2,985.24 km) |
| Birstonas to Cascais | 1,900.95 mi (3,059.28 km) |
