| Ponca City to Cernavoda | 5,868.56 mi (9,444.53 km) |
| Ponca City to Chitila | 5,792.26 mi (9,321.74 km) |
| Ponca City to Cisnadie | 5,670.48 mi (9,125.76 km) |
| Ponca City to Cluj-Napoca | 5,599.28 mi (9,011.17 km) |
| Ponca City to Codlea | 5,714.13 mi (9,196.01 km) |
| Ponca City to Comanesti | 5,709.58 mi (9,188.69 km) |
| Ponca City to Comarnic | 5,743.01 mi (9,242.49 km) |
| Ponca City to Constanta | 5,896.96 mi (9,490.24 km) |
| Ponca City to Corabia | 5,779.45 mi (9,301.12 km) |
| Ponca City to Costesti | 5,747.20 mi (9,249.22 km) |
| Ponca City to Covasna | 5,730.64 mi (9,222.58 km) |
| Ponca City to Craiova | 5,727.93 mi (9,218.22 km) |
| Ponca City to Cristuru Secuiesc | 5,670.73 mi (9,126.15 km) |
| Ponca City to Cugir | 5,637.61 mi (9,072.86 km) |
| Ponca City to Cumpana | 5,897.27 mi (9,490.73 km) |
