| Didcot to Cascais | 975.20 mi (1,569.43 km) |
| Didcot to Castelo Branco | 867.94 mi (1,396.81 km) |
| Didcot to Castro Daire | 805.03 mi (1,295.57 km) |
| Didcot to Celorico de Basto | 775.24 mi (1,247.63 km) |
| Didcot to Chamusca | 915.52 mi (1,473.39 km) |
| Didcot to Chaves | 742.21 mi (1,194.48 km) |
| Didcot to Cinfaes | 795.98 mi (1,281.01 km) |
| Didcot to Coimbra | 858.80 mi (1,382.11 km) |
| Didcot to Condeixa-a-Nova | 866.24 mi (1,394.07 km) |
| Didcot to Corroios | 975.59 mi (1,570.06 km) |
| Didcot to Coruche | 941.87 mi (1,515.80 km) |
| Didcot to Costa de Caparica | 975.27 mi (1,569.55 km) |
| Didcot to Covilha | 837.36 mi (1,347.60 km) |
| Didcot to Eiras | 856.71 mi (1,378.74 km) |
| Didcot to Elvas | 925.20 mi (1,488.96 km) |
