| Opfikon to Cascais | 1,085.89 mi (1,747.57 km) |
| Opfikon to Castelo Branco | 957.66 mi (1,541.20 km) |
| Opfikon to Castro Daire | 931.39 mi (1,498.93 km) |
| Opfikon to Celorico de Basto | 915.79 mi (1,473.83 km) |
| Opfikon to Chamusca | 1,018.68 mi (1,639.41 km) |
| Opfikon to Chaves | 879.50 mi (1,415.41 km) |
| Opfikon to Cinfaes | 932.30 mi (1,500.39 km) |
| Opfikon to Coimbra | 980.17 mi (1,577.43 km) |
| Opfikon to Condeixa-a-Nova | 987.04 mi (1,588.49 km) |
| Opfikon to Corroios | 1,078.65 mi (1,735.91 km) |
| Opfikon to Coruche | 1,037.71 mi (1,670.03 km) |
| Opfikon to Costa de Caparica | 1,080.82 mi (1,739.42 km) |
| Opfikon to Covilha | 937.87 mi (1,509.36 km) |
| Opfikon to Eiras | 978.68 mi (1,575.04 km) |
| Opfikon to Elvas | 985.85 mi (1,586.57 km) |
