| Ronkonkoma to Cascais | 3,310.52 mi (5,327.77 km) |
| Ronkonkoma to Castelo Branco | 3,373.30 mi (5,428.80 km) |
| Ronkonkoma to Castro Daire | 3,322.92 mi (5,347.73 km) |
| Ronkonkoma to Celorico de Basto | 3,307.00 mi (5,322.10 km) |
| Ronkonkoma to Chamusca | 3,338.28 mi (5,372.44 km) |
| Ronkonkoma to Chaves | 3,323.02 mi (5,347.88 km) |
| Ronkonkoma to Cinfaes | 3,308.01 mi (5,323.72 km) |
| Ronkonkoma to Coimbra | 3,317.36 mi (5,338.77 km) |
| Ronkonkoma to Condeixa-a-Nova | 3,316.47 mi (5,337.34 km) |
| Ronkonkoma to Corroios | 3,326.03 mi (5,352.72 km) |
| Ronkonkoma to Coruche | 3,347.11 mi (5,386.65 km) |
| Ronkonkoma to Costa de Caparica | 3,321.00 mi (5,344.64 km) |
| Ronkonkoma to Covilha | 3,360.47 mi (5,408.15 km) |
| Ronkonkoma to Eiras | 3,316.78 mi (5,337.84 km) |
| Ronkonkoma to Elvas | 3,417.16 mi (5,499.39 km) |
