| Allentown to Butzbach | 3,907.97 mi (6,289.27 km) |
| Allentown to Buxtehude | 3,860.93 mi (6,213.56 km) |
| Allentown to Cadolzburg | 4,025.98 mi (6,479.18 km) |
| Allentown to Calbe | 3,985.69 mi (6,414.34 km) |
| Allentown to Calw | 3,962.34 mi (6,376.77 km) |
| Allentown to Castrop-Rauxel | 3,822.90 mi (6,152.37 km) |
| Allentown to Celle | 3,899.59 mi (6,275.78 km) |
| Allentown to Cham | 4,104.61 mi (6,605.72 km) |
| Allentown to Chemnitz | 4,062.96 mi (6,538.70 km) |
| Allentown to Clausthal-Zellerfeld | 3,933.29 mi (6,330.01 km) |
| Allentown to Cloppenburg | 3,815.61 mi (6,140.63 km) |
| Allentown to Coburg | 4,004.50 mi (6,444.62 km) |
| Allentown to Coesfeld | 3,806.00 mi (6,125.17 km) |
| Allentown to Cologne | 3,825.56 mi (6,156.65 km) |
| Allentown to Coswig | 4,079.06 mi (6,564.62 km) |
