| Ponca City to Collegno | 5,093.55 mi (8,197.27 km) |
| Ponca City to Cologno al Serio | 5,155.56 mi (8,297.07 km) |
| Ponca City to Cologno Monzese | 5,141.57 mi (8,274.56 km) |
| Ponca City to Colorno | 5,209.27 mi (8,383.51 km) |
| Ponca City to Comacchio | 5,288.45 mi (8,510.94 km) |
| Ponca City to Comiso | 5,730.50 mi (9,222.34 km) |
| Ponca City to Como | 5,122.46 mi (8,243.80 km) |
| Ponca City to Concordia Sagittaria | 5,267.26 mi (8,476.83 km) |
| Ponca City to Concorezzo | 5,141.26 mi (8,274.05 km) |
| Ponca City to Conegliano | 5,241.35 mi (8,435.13 km) |
| Ponca City to Conselice | 5,282.98 mi (8,502.13 km) |
| Ponca City to Conselve | 5,253.31 mi (8,454.39 km) |
| Ponca City to Conversano | 5,646.01 mi (9,086.38 km) |
| Ponca City to Copertino | 5,714.78 mi (9,197.05 km) |
| Ponca City to Copparo | 5,266.42 mi (8,475.48 km) |
