| Oregon to Cortona | 4,571.10 mi (7,356.48 km) |
| Oregon to Cosenza | 4,913.41 mi (7,907.37 km) |
| Oregon to Cossato | 4,326.22 mi (6,962.38 km) |
| Oregon to Costa Volpino | 4,394.29 mi (7,071.92 km) |
| Oregon to Creazzo | 4,461.14 mi (7,179.52 km) |
| Oregon to Crema | 4,395.29 mi (7,073.54 km) |
| Oregon to Cremona | 4,418.41 mi (7,110.74 km) |
| Oregon to Crevalcore | 4,479.76 mi (7,209.48 km) |
| Oregon to Crispiano | 4,897.47 mi (7,881.72 km) |
| Oregon to Crosia | 4,923.26 mi (7,923.23 km) |
| Oregon to Crotone | 4,958.87 mi (7,980.53 km) |
| Oregon to Cuneo | 4,345.23 mi (6,992.97 km) |
| Oregon to Cuorgne | 4,311.73 mi (6,939.05 km) |
| Oregon to Cusano Milanino | 4,368.09 mi (7,029.76 km) |
| Oregon to Cutro | 4,955.51 mi (7,975.12 km) |
