| Ponca City to Cividale del Friuli | 5,274.39 mi (8,488.30 km) |
| Ponca City to Civita Castellana | 5,402.22 mi (8,694.03 km) |
| Ponca City to Civitanova Marche | 5,409.42 mi (8,705.61 km) |
| Ponca City to Civitavecchia | 5,386.64 mi (8,668.96 km) |
| Ponca City to Civitella in Val di Chiana | 5,326.09 mi (8,571.52 km) |
| Ponca City to Clusone | 5,152.59 mi (8,292.29 km) |
| Ponca City to Coccaglio | 5,167.10 mi (8,315.64 km) |
| Ponca City to Codigoro | 5,280.13 mi (8,497.54 km) |
| Ponca City to Codogno | 5,173.47 mi (8,325.90 km) |
| Ponca City to Codroipo | 5,263.54 mi (8,470.85 km) |
| Ponca City to Cogoleto | 5,164.19 mi (8,310.96 km) |
| Ponca City to Colle di Val d'Elsa | 5,303.96 mi (8,535.90 km) |
| Ponca City to Colle Salvetti | 5,269.84 mi (8,480.98 km) |
| Ponca City to Collecchio | 5,210.57 mi (8,385.61 km) |
| Ponca City to Colleferro | 5,451.02 mi (8,772.57 km) |
