| Ponca City to Cortona | 5,342.83 mi (8,598.45 km) |
| Ponca City to Cosenza | 5,689.45 mi (9,156.29 km) |
| Ponca City to Cossato | 5,096.86 mi (8,202.61 km) |
| Ponca City to Costa Volpino | 5,160.50 mi (8,305.03 km) |
| Ponca City to Creazzo | 5,225.85 mi (8,410.19 km) |
| Ponca City to Crema | 5,163.98 mi (8,310.62 km) |
| Ponca City to Cremona | 5,187.30 mi (8,348.15 km) |
| Ponca City to Crevalcore | 5,248.08 mi (8,445.97 km) |
| Ponca City to Crispiano | 5,667.60 mi (9,121.13 km) |
| Ponca City to Crosia | 5,697.52 mi (9,169.27 km) |
| Ponca City to Crotone | 5,733.86 mi (9,227.75 km) |
| Ponca City to Cuneo | 5,120.98 mi (8,241.42 km) |
| Ponca City to Cuorgne | 5,083.88 mi (8,181.72 km) |
| Ponca City to Cusano Milanino | 5,137.01 mi (8,267.22 km) |
| Ponca City to Cutro | 5,730.91 mi (9,223.01 km) |
