| Helena to Cascais | 4,856.63 mi (7,815.98 km) |
| Helena to Castelo Branco | 4,874.90 mi (7,845.39 km) |
| Helena to Castro Daire | 4,805.91 mi (7,734.36 km) |
| Helena to Celorico de Basto | 4,780.00 mi (7,692.66 km) |
| Helena to Chamusca | 4,860.65 mi (7,822.46 km) |
| Helena to Chaves | 4,782.13 mi (7,696.10 km) |
| Helena to Cinfaes | 4,788.78 mi (7,706.79 km) |
| Helena to Coimbra | 4,820.83 mi (7,758.38 km) |
| Helena to Condeixa-a-Nova | 4,822.75 mi (7,761.46 km) |
| Helena to Corroios | 4,870.97 mi (7,839.07 km) |
| Helena to Coruche | 4,878.15 mi (7,850.63 km) |
| Helena to Costa de Caparica | 4,866.27 mi (7,831.50 km) |
| Helena to Covilha | 4,852.07 mi (7,808.66 km) |
| Helena to Eiras | 4,819.52 mi (7,756.27 km) |
| Helena to Elvas | 4,934.73 mi (7,941.68 km) |
