| Portage to Cordele (Georgia) | 714.80 mi (1,150.37 km) |
| Portage to Corinth (Mississippi) | 525.31 mi (845.40 km) |
| Portage to Corinth (Texas) | 884.75 mi (1,423.87 km) |
| Portage to Cornelius (North Carolina) | 529.22 mi (851.70 km) |
| Portage to Cornelius (Oregon) | 1,863.15 mi (2,998.44 km) |
| Portage to Corning (New York) | 436.85 mi (703.04 km) |
| Portage to Corona (California) | 1,820.59 mi (2,929.96 km) |
| Portage to Coronado (California) | 1,840.24 mi (2,961.58 km) |
| Portage to Corpus Christi (Texas) | 1,199.67 mi (1,930.68 km) |
| Portage to Corsicana (Texas) | 919.01 mi (1,479.00 km) |
| Portage to Cortland (New York) | 480.78 mi (773.74 km) |
| Portage to Corvallis (Oregon) | 1,882.64 mi (3,029.81 km) |
| Portage to Coshocton (Ohio) | 236.08 mi (379.94 km) |
| Portage to Costa Mesa (California) | 1,844.60 mi (2,968.59 km) |
| Portage to Coto de Caza (California) | 1,830.32 mi (2,945.61 km) |
