| Cincinnati to Cascais | 3,910.94 mi (6,294.05 km) |
| Cincinnati to Castelo Branco | 3,968.87 mi (6,387.28 km) |
| Cincinnati to Castro Daire | 3,915.68 mi (6,301.68 km) |
| Cincinnati to Celorico de Basto | 3,898.27 mi (6,273.66 km) |
| Cincinnati to Chamusca | 3,936.13 mi (6,334.60 km) |
| Cincinnati to Chaves | 3,912.52 mi (6,296.59 km) |
| Cincinnati to Cinfaes | 3,900.34 mi (6,276.99 km) |
| Cincinnati to Coimbra | 3,912.73 mi (6,296.93 km) |
| Cincinnati to Condeixa-a-Nova | 3,912.19 mi (6,296.06 km) |
| Cincinnati to Corroios | 3,926.42 mi (6,318.96 km) |
| Cincinnati to Coruche | 3,946.05 mi (6,350.55 km) |
| Cincinnati to Costa de Caparica | 3,921.40 mi (6,310.88 km) |
| Cincinnati to Covilha | 3,954.66 mi (6,364.42 km) |
| Cincinnati to Eiras | 3,912.05 mi (6,295.84 km) |
| Cincinnati to Elvas | 4,015.00 mi (6,461.52 km) |
