| Portage to Cullman (Alabama) | 558.42 mi (898.70 km) |
| Portage to Culpeper (Virginia) | 475.34 mi (764.99 km) |
| Portage to Culver City (California) | 1,858.20 mi (2,990.48 km) |
| Portage to Cumberland (Maryland) | 397.60 mi (639.87 km) |
| Portage to Cupertino (California) | 1,950.30 mi (3,138.71 km) |
| Portage to Cutler Bay (Florida) | 1,186.82 mi (1,910.00 km) |
| Portage to Cutlerville (Michigan) | 44.44 mi (71.52 km) |
| Portage to Cuyahoga Falls (Ohio) | 221.85 mi (357.03 km) |
| Portage to Cypress (California) | 1,846.06 mi (2,970.95 km) |
| Portage to Cypress Gardens (Florida) | 1,005.09 mi (1,617.54 km) |
| Portage to Cypress Lake (Florida) | 1,102.03 mi (1,773.55 km) |
| Portage to D'Iberville (Mississippi) | 830.90 mi (1,337.20 km) |
| Portage to Dakota Ridge (Colorado) | 1,033.60 mi (1,663.41 km) |
| Portage to Dale City (Virginia) | 497.98 mi (801.43 km) |
| Portage to Dallas (Georgia) | 573.87 mi (923.55 km) |
