| Okmulgee to Cortona | 5,355.19 mi (8,618.35 km) |
| Okmulgee to Cosenza | 5,700.11 mi (9,173.45 km) |
| Okmulgee to Cossato | 5,109.55 mi (8,223.03 km) |
| Okmulgee to Costa Volpino | 5,174.95 mi (8,328.27 km) |
| Okmulgee to Creazzo | 5,240.89 mi (8,434.40 km) |
| Okmulgee to Crema | 5,177.47 mi (8,332.34 km) |
| Okmulgee to Cremona | 5,200.72 mi (8,369.76 km) |
| Okmulgee to Crevalcore | 5,261.76 mi (8,467.99 km) |
| Okmulgee to Crispiano | 5,680.76 mi (9,142.30 km) |
| Okmulgee to Crosia | 5,708.96 mi (9,187.69 km) |
| Okmulgee to Crotone | 5,745.00 mi (9,245.68 km) |
| Okmulgee to Cuneo | 5,131.54 mi (8,258.42 km) |
| Okmulgee to Cuorgne | 5,095.95 mi (8,201.14 km) |
| Okmulgee to Cusano Milanino | 5,150.40 mi (8,288.77 km) |
| Okmulgee to Cutro | 5,741.87 mi (9,240.65 km) |
