| Ronkonkoma to Cernavoda | 4,794.68 mi (7,716.30 km) |
| Ronkonkoma to Chitila | 4,706.68 mi (7,574.67 km) |
| Ronkonkoma to Cisnadie | 4,585.63 mi (7,379.85 km) |
| Ronkonkoma to Cluj-Napoca | 4,521.95 mi (7,277.37 km) |
| Ronkonkoma to Codlea | 4,637.18 mi (7,462.82 km) |
| Ronkonkoma to Comanesti | 4,646.66 mi (7,478.08 km) |
| Ronkonkoma to Comarnic | 4,662.71 mi (7,503.91 km) |
| Ronkonkoma to Constanta | 4,825.41 mi (7,765.75 km) |
| Ronkonkoma to Corabia | 4,677.32 mi (7,527.43 km) |
| Ronkonkoma to Costesti | 4,656.28 mi (7,493.55 km) |
| Ronkonkoma to Covasna | 4,659.98 mi (7,499.52 km) |
| Ronkonkoma to Craiova | 4,627.10 mi (7,446.60 km) |
| Ronkonkoma to Cristuru Secuiesc | 4,597.37 mi (7,398.74 km) |
| Ronkonkoma to Cugir | 4,549.30 mi (7,321.39 km) |
| Ronkonkoma to Cumpana | 4,824.66 mi (7,764.54 km) |
