| Gebze to Cascais | 2,051.99 mi (3,302.35 km) |
| Gebze to Castelo Branco | 1,932.67 mi (3,110.34 km) |
| Gebze to Castro Daire | 1,937.80 mi (3,118.58 km) |
| Gebze to Celorico de Basto | 1,934.34 mi (3,113.02 km) |
| Gebze to Chamusca | 1,991.50 mi (3,205.00 km) |
| Gebze to Chaves | 1,902.81 mi (3,062.28 km) |
| Gebze to Cinfaes | 1,945.09 mi (3,130.32 km) |
| Gebze to Coimbra | 1,973.86 mi (3,176.62 km) |
| Gebze to Condeixa-a-Nova | 1,979.04 mi (3,184.96 km) |
| Gebze to Corroios | 2,039.93 mi (3,282.94 km) |
| Gebze to Coruche | 2,001.04 mi (3,220.36 km) |
| Gebze to Costa de Caparica | 2,043.72 mi (3,289.05 km) |
| Gebze to Covilha | 1,925.04 mi (3,098.06 km) |
| Gebze to Eiras | 1,973.09 mi (3,175.38 km) |
| Gebze to Elvas | 1,931.53 mi (3,108.49 km) |
