| Guyancourt to Castelo Branco | 777.79 mi (1,251.74 km) |
| Guyancourt to Castro Daire | 731.02 mi (1,176.46 km) |
| Guyancourt to Celorico de Basto | 707.46 mi (1,138.55 km) |
| Guyancourt to Chamusca | 834.12 mi (1,342.39 km) |
| Guyancourt to Chaves | 670.95 mi (1,079.79 km) |
| Guyancourt to Cinfaes | 726.89 mi (1,169.82 km) |
| Guyancourt to Coimbra | 784.54 mi (1,262.59 km) |
| Guyancourt to Condeixa-a-Nova | 791.99 mi (1,274.58 km) |
| Guyancourt to Corroios | 896.30 mi (1,442.46 km) |
| Guyancourt to Coruche | 857.76 mi (1,380.43 km) |
| Guyancourt to Costa de Caparica | 897.23 mi (1,443.96 km) |
| Guyancourt to Covilha | 751.33 mi (1,209.15 km) |
| Guyancourt to Eiras | 782.68 mi (1,259.60 km) |
| Guyancourt to Elvas | 823.15 mi (1,324.74 km) |
| Guyancourt to Entroncamento | 827.16 mi (1,331.18 km) |
