| Oklahoma City to Collegno | 5,172.39 mi (8,324.16 km) |
| Oklahoma City to Cologno al Serio | 5,235.41 mi (8,425.57 km) |
| Oklahoma City to Cologno Monzese | 5,221.25 mi (8,402.80 km) |
| Oklahoma City to Colorno | 5,288.94 mi (8,511.73 km) |
| Oklahoma City to Comacchio | 5,368.58 mi (8,639.90 km) |
| Oklahoma City to Comiso | 5,806.83 mi (9,345.18 km) |
| Oklahoma City to Como | 5,202.25 mi (8,372.22 km) |
| Oklahoma City to Concordia Sagittaria | 5,348.21 mi (8,607.12 km) |
| Oklahoma City to Concorezzo | 5,220.99 mi (8,402.38 km) |
| Oklahoma City to Conegliano | 5,322.20 mi (8,565.25 km) |
| Oklahoma City to Conselice | 5,362.89 mi (8,630.73 km) |
| Oklahoma City to Conselve | 5,333.65 mi (8,583.68 km) |
| Oklahoma City to Conversano | 5,725.77 mi (9,214.74 km) |
| Oklahoma City to Copertino | 5,794.51 mi (9,325.36 km) |
| Oklahoma City to Copparo | 5,346.55 mi (8,604.44 km) |
