| Portage to Commerce (California) | 1,846.06 mi (2,970.94 km) |
| Portage to Commerce City (Colorado) | 1,014.09 mi (1,632.01 km) |
| Portage to Compton (California) | 1,853.20 mi (2,982.44 km) |
| Portage to Comstock Park (Michigan) | 58.47 mi (94.10 km) |
| Portage to Concord (California) | 1,931.86 mi (3,109.03 km) |
| Portage to Concord (Missouri) | 357.56 mi (575.44 km) |
| Portage to Concord (New Hampshire) | 714.99 mi (1,150.67 km) |
| Portage to Concord (North Carolina) | 540.44 mi (869.75 km) |
| Portage to Conneaut (Ohio) | 258.26 mi (415.62 km) |
| Portage to Connersville (Indiana) | 177.18 mi (285.15 km) |
| Portage to Conroe (Texas) | 986.87 mi (1,588.21 km) |
| Portage to Converse (Texas) | 1,126.97 mi (1,813.68 km) |
| Portage to Conway (Arkansas) | 616.09 mi (991.49 km) |
| Portage to Conway (Florida) | 976.39 mi (1,571.35 km) |
| Portage to Conway (South Carolina) | 678.20 mi (1,091.46 km) |
