| Olean to Cascais | 3,538.29 mi (5,694.33 km) |
| Olean to Castelo Branco | 3,594.25 mi (5,784.39 km) |
| Olean to Castro Daire | 3,540.27 mi (5,697.51 km) |
| Olean to Celorico de Basto | 3,522.50 mi (5,668.92 km) |
| Olean to Chamusca | 3,562.35 mi (5,733.05 km) |
| Olean to Chaves | 3,536.36 mi (5,691.22 km) |
| Olean to Cinfaes | 3,524.82 mi (5,672.66 km) |
| Olean to Coimbra | 3,538.08 mi (5,693.98 km) |
| Olean to Condeixa-a-Nova | 3,537.65 mi (5,693.29 km) |
| Olean to Corroios | 3,553.74 mi (5,719.19 km) |
| Olean to Coruche | 3,572.70 mi (5,749.71 km) |
| Olean to Costa de Caparica | 3,548.73 mi (5,711.12 km) |
| Olean to Covilha | 3,579.63 mi (5,760.86 km) |
| Olean to Eiras | 3,537.37 mi (5,692.84 km) |
| Olean to Elvas | 3,641.17 mi (5,859.90 km) |
