| Harlingen to Castelo Branco | 1,105.21 mi (1,778.66 km) |
| Harlingen to Castro Daire | 1,052.25 mi (1,693.43 km) |
| Harlingen to Celorico de Basto | 1,025.90 mi (1,651.02 km) |
| Harlingen to Chamusca | 1,159.08 mi (1,865.36 km) |
| Harlingen to Chaves | 990.34 mi (1,593.80 km) |
| Harlingen to Cinfaes | 1,046.11 mi (1,683.55 km) |
| Harlingen to Coimbra | 1,106.43 mi (1,780.63 km) |
| Harlingen to Condeixa-a-Nova | 1,113.94 mi (1,792.72 km) |
| Harlingen to Corroios | 1,220.99 mi (1,965.00 km) |
| Harlingen to Coruche | 1,183.84 mi (1,905.20 km) |
| Harlingen to Costa de Caparica | 1,221.48 mi (1,965.78 km) |
| Harlingen to Covilha | 1,077.16 mi (1,733.52 km) |
| Harlingen to Eiras | 1,104.46 mi (1,777.45 km) |
| Harlingen to Elvas | 1,154.35 mi (1,857.74 km) |
| Harlingen to Entroncamento | 1,151.78 mi (1,853.61 km) |
