| Oklahoma City to Cortona | 5,422.05 mi (8,725.94 km) |
| Oklahoma City to Cosenza | 5,767.92 mi (9,282.57 km) |
| Oklahoma City to Cossato | 5,176.21 mi (8,330.31 km) |
| Oklahoma City to Costa Volpino | 5,240.63 mi (8,433.98 km) |
| Oklahoma City to Creazzo | 5,306.24 mi (8,539.56 km) |
| Oklahoma City to Crema | 5,243.69 mi (8,438.90 km) |
| Oklahoma City to Cremona | 5,266.98 mi (8,476.38 km) |
| Oklahoma City to Crevalcore | 5,327.88 mi (8,574.39 km) |
| Oklahoma City to Crispiano | 5,747.20 mi (9,249.23 km) |
| Oklahoma City to Crosia | 5,776.35 mi (9,296.14 km) |
| Oklahoma City to Crotone | 5,812.55 mi (9,354.40 km) |
| Oklahoma City to Cuneo | 5,199.36 mi (8,367.56 km) |
| Oklahoma City to Cuorgne | 5,162.95 mi (8,308.97 km) |
| Oklahoma City to Cusano Milanino | 5,216.67 mi (8,395.43 km) |
| Oklahoma City to Cutro | 5,809.52 mi (9,349.52 km) |
