| Mason City to Chojnice | 4,597.31 mi (7,398.65 km) |
| Mason City to Chojnow | 4,658.75 mi (7,497.53 km) |
| Mason City to Chorzow | 4,800.83 mi (7,726.19 km) |
| Mason City to Choszczno | 4,555.75 mi (7,331.77 km) |
| Mason City to Chrzanow | 4,823.14 mi (7,762.10 km) |
| Mason City to Ciechanow | 4,729.67 mi (7,611.67 km) |
| Mason City to Ciechocinek | 4,672.98 mi (7,520.43 km) |
| Mason City to Cieszyn | 4,816.99 mi (7,752.19 km) |
| Mason City to Czarna Bialostocka | 4,786.38 mi (7,702.94 km) |
| Mason City to Czarnkow | 4,603.84 mi (7,409.17 km) |
| Mason City to Czechowice-Dziedzice | 4,821.16 mi (7,758.91 km) |
| Mason City to Czeladz | 4,803.48 mi (7,730.45 km) |
| Mason City to Czersk Pomorski | 4,605.87 mi (7,412.43 km) |
| Mason City to Czestochowa | 4,782.20 mi (7,696.21 km) |
| Mason City to Czluchow | 4,593.26 mi (7,392.14 km) |
