| Southborough to Chojnice | 746.99 mi (1,202.17 km) |
| Southborough to Chojnow | 676.89 mi (1,089.36 km) |
| Southborough to Chorzow | 817.11 mi (1,315.02 km) |
| Southborough to Choszczno | 655.63 mi (1,055.13 km) |
| Southborough to Chrzanow | 838.94 mi (1,350.15 km) |
| Southborough to Ciechanow | 871.15 mi (1,401.98 km) |
| Southborough to Ciechocinek | 794.01 mi (1,277.84 km) |
| Southborough to Cieszyn | 811.72 mi (1,306.33 km) |
| Southborough to Czarna Bialostocka | 980.87 mi (1,578.55 km) |
| Southborough to Czarnkow | 701.73 mi (1,129.33 km) |
| Southborough to Czechowice-Dziedzice | 825.24 mi (1,328.10 km) |
| Southborough to Czeladz | 822.43 mi (1,323.57 km) |
| Southborough to Czersk Pomorski | 764.93 mi (1,231.04 km) |
| Southborough to Czestochowa | 818.18 mi (1,316.74 km) |
| Southborough to Czluchow | 739.28 mi (1,189.75 km) |
