| Piqua to Cosham | 3,878.18 mi (6,241.33 km) |
| Piqua to Costessey | 3,916.07 mi (6,302.30 km) |
| Piqua to Cottingham | 3,823.43 mi (6,153.22 km) |
| Piqua to Coulsdon | 3,901.45 mi (6,278.78 km) |
| Piqua to Coventry | 3,817.87 mi (6,144.27 km) |
| Piqua to Cowdenbeath | 3,657.53 mi (5,886.23 km) |
| Piqua to Cowes | 3,871.15 mi (6,230.01 km) |
| Piqua to Cowley | 3,882.15 mi (6,247.72 km) |
| Piqua to Cowley | 3,847.64 mi (6,192.17 km) |
| Piqua to Cramlington | 3,746.51 mi (6,029.42 km) |
| Piqua to Cranleigh | 3,893.26 mi (6,265.59 km) |
| Piqua to Crawley | 3,905.54 mi (6,285.37 km) |
| Piqua to Crayford | 3,910.39 mi (6,293.16 km) |
| Piqua to Crewe | 3,763.87 mi (6,057.37 km) |
| Piqua to Crigglestone | 3,785.05 mi (6,091.44 km) |
