| Oklahoma City to Cividale del Friuli | 5,355.70 mi (8,619.17 km) |
| Oklahoma City to Civita Castellana | 5,481.00 mi (8,820.82 km) |
| Oklahoma City to Civitanova Marche | 5,489.26 mi (8,834.12 km) |
| Oklahoma City to Civitavecchia | 5,465.08 mi (8,795.19 km) |
| Oklahoma City to Civitella in Val di Chiana | 5,405.30 mi (8,699.00 km) |
| Oklahoma City to Clusone | 5,232.70 mi (8,421.21 km) |
| Oklahoma City to Coccaglio | 5,247.02 mi (8,444.27 km) |
| Oklahoma City to Codigoro | 5,360.31 mi (8,626.59 km) |
| Oklahoma City to Codogno | 5,253.07 mi (8,453.99 km) |
| Oklahoma City to Codroipo | 5,344.64 mi (8,601.37 km) |
| Oklahoma City to Cogoleto | 5,242.95 mi (8,437.71 km) |
| Oklahoma City to Colle di Val d'Elsa | 5,382.96 mi (8,663.03 km) |
| Oklahoma City to Colle Salvetti | 5,348.73 mi (8,607.95 km) |
| Oklahoma City to Collecchio | 5,290.08 mi (8,513.57 km) |
| Oklahoma City to Colleferro | 5,529.68 mi (8,899.16 km) |
