| Onex to Cascais | 942.56 mi (1,516.90 km) |
| Onex to Castelo Branco | 814.25 mi (1,310.41 km) |
| Onex to Castro Daire | 790.42 mi (1,272.06 km) |
| Onex to Celorico de Basto | 776.15 mi (1,249.09 km) |
| Onex to Chamusca | 875.44 mi (1,408.89 km) |
| Onex to Chaves | 740.20 mi (1,191.23 km) |
| Onex to Cinfaes | 792.06 mi (1,274.70 km) |
| Onex to Coimbra | 838.28 mi (1,349.09 km) |
| Onex to Condeixa-a-Nova | 845.05 mi (1,359.98 km) |
| Onex to Corroios | 935.02 mi (1,504.77 km) |
| Onex to Coruche | 894.01 mi (1,438.78 km) |
| Onex to Costa de Caparica | 937.29 mi (1,508.42 km) |
| Onex to Covilha | 795.19 mi (1,279.74 km) |
| Onex to Eiras | 836.85 mi (1,346.79 km) |
| Onex to Elvas | 841.23 mi (1,353.83 km) |
