| Portage to Carlsbad (California) | 1,830.71 mi (2,946.24 km) |
| Portage to Carlsbad (New Mexico) | 1,224.10 mi (1,970.00 km) |
| Portage to Carmel (Indiana) | 157.11 mi (252.84 km) |
| Portage to Carmichael (California) | 1,882.04 mi (3,028.85 km) |
| Portage to Carney (Maryland) | 511.70 mi (823.50 km) |
| Portage to Carnot-Moon (Pennsylvania) | 301.81 mi (485.71 km) |
| Portage to Carol Stream (Illinois) | 131.75 mi (212.03 km) |
| Portage to Carolina (Puerto Rico) | 2,006.95 mi (3,229.87 km) |
| Portage to Carolina Forest (South Carolina) | 686.41 mi (1,104.68 km) |
| Portage to Carpentersville (Illinois) | 138.33 mi (222.62 km) |
| Portage to Carpinteria (California) | 1,902.70 mi (3,062.10 km) |
| Portage to Carrboro (North Carolina) | 556.07 mi (894.90 km) |
| Portage to Carroll (Iowa) | 475.03 mi (764.48 km) |
| Portage to Carrollton (Georgia) | 596.10 mi (959.33 km) |
| Portage to Carrollton (Texas) | 886.34 mi (1,426.43 km) |
