| Omaha to Cascais | 4,384.86 mi (7,056.75 km) |
| Omaha to Castelo Branco | 4,428.50 mi (7,126.98 km) |
| Omaha to Castro Daire | 4,368.58 mi (7,030.55 km) |
| Omaha to Celorico de Basto | 4,347.67 mi (6,996.90 km) |
| Omaha to Chamusca | 4,402.36 mi (7,084.92 km) |
| Omaha to Chaves | 4,357.45 mi (7,012.64 km) |
| Omaha to Cinfaes | 4,352.35 mi (7,004.42 km) |
| Omaha to Coimbra | 4,372.42 mi (7,036.73 km) |
| Omaha to Condeixa-a-Nova | 4,372.81 mi (7,037.36 km) |
| Omaha to Corroios | 4,400.10 mi (7,081.28 km) |
| Omaha to Coruche | 4,415.27 mi (7,105.70 km) |
| Omaha to Costa de Caparica | 4,395.14 mi (7,073.29 km) |
| Omaha to Covilha | 4,410.82 mi (7,098.53 km) |
| Omaha to Eiras | 4,371.49 mi (7,035.24 km) |
| Omaha to Elvas | 4,480.40 mi (7,210.51 km) |
