| Ronkonkoma to Chojnice | 4,047.18 mi (6,513.31 km) |
| Ronkonkoma to Chojnow | 4,064.95 mi (6,541.91 km) |
| Ronkonkoma to Chorzow | 4,212.58 mi (6,779.50 km) |
| Ronkonkoma to Choszczno | 3,985.63 mi (6,414.25 km) |
| Ronkonkoma to Chrzanow | 4,235.57 mi (6,816.49 km) |
| Ronkonkoma to Ciechanow | 4,186.53 mi (6,737.57 km) |
| Ronkonkoma to Ciechocinek | 4,118.69 mi (6,628.39 km) |
| Ronkonkoma to Cieszyn | 4,219.51 mi (6,790.64 km) |
| Ronkonkoma to Czarna Bialostocka | 4,265.93 mi (6,865.36 km) |
| Ronkonkoma to Czarnkow | 4,036.58 mi (6,496.24 km) |
| Ronkonkoma to Czechowice-Dziedzice | 4,228.19 mi (6,804.62 km) |
| Ronkonkoma to Czeladz | 4,216.51 mi (6,785.82 km) |
| Ronkonkoma to Czersk Pomorski | 4,059.56 mi (6,533.22 km) |
| Ronkonkoma to Czestochowa | 4,201.63 mi (6,761.87 km) |
| Ronkonkoma to Czluchow | 4,041.58 mi (6,504.30 km) |
