| Allentown to Chojnice | 4,142.36 mi (6,666.48 km) |
| Allentown to Chojnow | 4,164.20 mi (6,701.63 km) |
| Allentown to Chorzow | 4,311.68 mi (6,938.97 km) |
| Allentown to Choszczno | 4,082.50 mi (6,570.16 km) |
| Allentown to Chrzanow | 4,334.66 mi (6,975.96 km) |
| Allentown to Ciechanow | 4,281.42 mi (6,890.29 km) |
| Allentown to Ciechocinek | 4,214.45 mi (6,782.50 km) |
| Allentown to Cieszyn | 4,319.45 mi (6,951.48 km) |
| Allentown to Czarna Bialostocka | 4,358.91 mi (7,014.99 km) |
| Allentown to Czarnkow | 4,133.32 mi (6,651.94 km) |
| Allentown to Czechowice-Dziedzice | 4,327.75 mi (6,964.84 km) |
| Allentown to Czeladz | 4,315.50 mi (6,945.13 km) |
| Allentown to Czersk Pomorski | 4,154.41 mi (6,685.88 km) |
| Allentown to Czestochowa | 4,300.01 mi (6,920.19 km) |
| Allentown to Czluchow | 4,136.89 mi (6,657.68 km) |
