| Oklahoma City to Cassina de' Pecchi | 5,225.19 mi (8,409.12 km) |
| Oklahoma City to Cassino | 5,572.48 mi (8,968.04 km) |
| Oklahoma City to Castagneto Carducci | 5,371.62 mi (8,644.78 km) |
| Oklahoma City to Castano Primo | 5,200.41 mi (8,369.25 km) |
| Oklahoma City to Castel Bolognese | 5,370.13 mi (8,642.38 km) |
| Oklahoma City to Castel Gandolfo | 5,514.50 mi (8,874.73 km) |
| Oklahoma City to Castel Goffredo | 5,277.28 mi (8,492.97 km) |
| Oklahoma City to Castel Maggiore | 5,342.65 mi (8,598.16 km) |
| Oklahoma City to Castel Mella | 5,256.30 mi (8,459.19 km) |
| Oklahoma City to Castel San Giorgio | 5,638.87 mi (9,074.88 km) |
| Oklahoma City to Castel San Giovanni | 5,246.97 mi (8,444.18 km) |
| Oklahoma City to Castel San Pietro Terme | 5,358.15 mi (8,623.11 km) |
| Oklahoma City to Castel Volturno | 5,595.71 mi (9,005.43 km) |
| Oklahoma City to Castelbuono | 5,741.86 mi (9,240.63 km) |
| Oklahoma City to Casteldaccia | 5,713.07 mi (9,194.30 km) |
