| Portage to Cadillac (Michigan) | 141.86 mi (228.31 km) |
| Portage to Caguas (Puerto Rico) | 2,015.26 mi (3,243.25 km) |
| Portage to Cahokia (Illinois) | 348.32 mi (560.57 km) |
| Portage to Calabasas (California) | 1,867.86 mi (3,006.03 km) |
| Portage to Caldwell (Idaho) | 1,565.91 mi (2,520.09 km) |
| Portage to Caledonia (Wisconsin) | 123.55 mi (198.84 km) |
| Portage to Calera (Alabama) | 630.15 mi (1,014.12 km) |
| Portage to Calexico (California) | 1,755.93 mi (2,825.89 km) |
| Portage to Calhoun (Georgia) | 533.81 mi (859.08 km) |
| Portage to California (Maryland) | 549.84 mi (884.88 km) |
| Portage to California City (California) | 1,795.99 mi (2,890.37 km) |
| Portage to Callaway (Florida) | 833.62 mi (1,341.58 km) |
| Portage to Calumet City (Illinois) | 108.62 mi (174.81 km) |
| Portage to Calverton (Maryland) | 502.15 mi (808.13 km) |
| Portage to Camano (Washington) | 1,824.05 mi (2,935.53 km) |
