| Clemmons to Cascais | 3,800.10 mi (6,115.67 km) |
| Clemmons to Castelo Branco | 3,867.97 mi (6,224.90 km) |
| Clemmons to Castro Daire | 3,820.14 mi (6,147.92 km) |
| Clemmons to Celorico de Basto | 3,805.40 mi (6,124.20 km) |
| Clemmons to Chamusca | 3,830.74 mi (6,164.98 km) |
| Clemmons to Chaves | 3,822.67 mi (6,151.99 km) |
| Clemmons to Cinfaes | 3,805.59 mi (6,124.50 km) |
| Clemmons to Coimbra | 3,812.33 mi (6,135.35 km) |
| Clemmons to Condeixa-a-Nova | 3,811.11 mi (6,133.39 km) |
| Clemmons to Corroios | 3,815.61 mi (6,140.62 km) |
| Clemmons to Coruche | 3,838.36 mi (6,177.24 km) |
| Clemmons to Costa de Caparica | 3,810.59 mi (6,132.55 km) |
| Clemmons to Covilha | 3,856.40 mi (6,206.28 km) |
| Clemmons to Eiras | 3,811.83 mi (6,134.55 km) |
| Clemmons to Elvas | 3,909.48 mi (6,291.70 km) |
