| Ponca City to Chivasso | 5,101.30 mi (8,209.75 km) |
| Ponca City to Ciampino | 5,431.57 mi (8,741.26 km) |
| Ponca City to Cicciano | 5,545.25 mi (8,924.22 km) |
| Ponca City to Cingoli | 5,386.55 mi (8,668.81 km) |
| Ponca City to Cinisello Balsamo | 5,138.30 mi (8,269.30 km) |
| Ponca City to Cinisi | 5,613.36 mi (9,033.83 km) |
| Ponca City to Cirie | 5,088.22 mi (8,188.70 km) |
| Ponca City to Ciro Marina | 5,720.93 mi (9,206.95 km) |
| Ponca City to Cislago | 5,124.49 mi (8,247.07 km) |
| Ponca City to Cisterna di Latina | 5,449.86 mi (8,770.71 km) |
| Ponca City to Cisternino | 5,669.11 mi (9,123.54 km) |
| Ponca City to Citta di Castello | 5,344.72 mi (8,601.50 km) |
| Ponca City to Citta Sant'Angelo | 5,456.61 mi (8,781.56 km) |
| Ponca City to Cittadella | 5,232.20 mi (8,420.42 km) |
| Ponca City to Cittanova | 5,726.74 mi (9,216.30 km) |
