| Castel Gandolfo to Castelo Branco | 1,060.23 mi (1,706.27 km) |
| Castel Gandolfo to Castro Daire | 1,067.19 mi (1,717.48 km) |
| Castel Gandolfo to Celorico de Basto | 1,065.35 mi (1,714.51 km) |
| Castel Gandolfo to Chamusca | 1,119.00 mi (1,800.86 km) |
| Castel Gandolfo to Chaves | 1,035.03 mi (1,665.72 km) |
| Castel Gandolfo to Cinfaes | 1,075.17 mi (1,730.31 km) |
| Castel Gandolfo to Coimbra | 1,101.96 mi (1,773.43 km) |
| Castel Gandolfo to Condeixa-a-Nova | 1,107.03 mi (1,781.59 km) |
| Castel Gandolfo to Corroios | 1,167.79 mi (1,879.37 km) |
| Castel Gandolfo to Coruche | 1,128.72 mi (1,816.50 km) |
| Castel Gandolfo to Costa de Caparica | 1,171.53 mi (1,885.39 km) |
| Castel Gandolfo to Covilha | 1,053.01 mi (1,694.66 km) |
| Castel Gandolfo to Eiras | 1,101.23 mi (1,772.26 km) |
| Castel Gandolfo to Elvas | 1,059.68 mi (1,705.39 km) |
| Castel Gandolfo to Entroncamento | 1,116.14 mi (1,796.26 km) |
