| Rockville Centre to Cascais | 3,339.09 mi (5,373.75 km) |
| Rockville Centre to Castelo Branco | 3,401.85 mi (5,474.75 km) |
| Rockville Centre to Castro Daire | 3,351.45 mi (5,393.63 km) |
| Rockville Centre to Celorico de Basto | 3,335.50 mi (5,367.97 km) |
| Rockville Centre to Chamusca | 3,366.84 mi (5,418.40 km) |
| Rockville Centre to Chaves | 3,351.50 mi (5,393.71 km) |
| Rockville Centre to Cinfaes | 3,336.52 mi (5,369.61 km) |
| Rockville Centre to Coimbra | 3,345.91 mi (5,384.71 km) |
| Rockville Centre to Condeixa-a-Nova | 3,345.02 mi (5,383.28 km) |
| Rockville Centre to Corroios | 3,354.59 mi (5,398.70 km) |
| Rockville Centre to Coruche | 3,375.67 mi (5,432.62 km) |
| Rockville Centre to Costa de Caparica | 3,349.57 mi (5,390.62 km) |
| Rockville Centre to Covilha | 3,389.00 mi (5,454.07 km) |
| Rockville Centre to Eiras | 3,345.32 mi (5,383.77 km) |
| Rockville Centre to Elvas | 3,445.72 mi (5,545.36 km) |
