| Okmulgee to Collegno | 5,105.12 mi (8,215.89 km) |
| Okmulgee to Cologno al Serio | 5,169.37 mi (8,319.29 km) |
| Okmulgee to Cologno Monzese | 5,155.00 mi (8,296.18 km) |
| Okmulgee to Colorno | 5,222.68 mi (8,405.09 km) |
| Okmulgee to Comacchio | 5,302.89 mi (8,534.17 km) |
| Okmulgee to Comiso | 5,736.70 mi (9,232.33 km) |
| Okmulgee to Como | 5,136.15 mi (8,265.83 km) |
| Okmulgee to Concordia Sagittaria | 5,283.63 mi (8,503.18 km) |
| Okmulgee to Concorezzo | 5,154.81 mi (8,295.87 km) |
| Okmulgee to Conegliano | 5,257.47 mi (8,461.09 km) |
| Okmulgee to Conselice | 5,296.90 mi (8,524.54 km) |
| Okmulgee to Conselve | 5,268.23 mi (8,478.40 km) |
| Okmulgee to Conversano | 5,659.53 mi (9,108.13 km) |
| Okmulgee to Copertino | 5,728.22 mi (9,218.68 km) |
| Okmulgee to Copparo | 5,280.86 mi (8,498.73 km) |
