| Alpena to Cascais | 3,698.67 mi (5,952.44 km) |
| Alpena to Castelo Branco | 3,743.96 mi (6,025.31 km) |
| Alpena to Castro Daire | 3,685.00 mi (5,930.43 km) |
| Alpena to Celorico de Basto | 3,664.65 mi (5,897.69 km) |
| Alpena to Chamusca | 3,716.96 mi (5,981.86 km) |
| Alpena to Chaves | 3,675.25 mi (5,914.75 km) |
| Alpena to Cinfaes | 3,668.89 mi (5,904.51 km) |
| Alpena to Coimbra | 3,687.82 mi (5,934.97 km) |
| Alpena to Condeixa-a-Nova | 3,688.08 mi (5,935.39 km) |
| Alpena to Corroios | 3,713.94 mi (5,977.01 km) |
| Alpena to Coruche | 3,729.55 mi (6,002.13 km) |
| Alpena to Costa de Caparica | 3,708.97 mi (5,969.01 km) |
| Alpena to Covilha | 3,726.77 mi (5,997.66 km) |
| Alpena to Eiras | 3,686.93 mi (5,933.53 km) |
| Alpena to Elvas | 3,795.15 mi (6,107.71 km) |
