| Oak Ridge to Cehegin | 4,390.46 mi (7,065.77 km) |
| Oak Ridge to Cervello | 4,467.42 mi (7,189.61 km) |
| Oak Ridge to Cervera | 4,427.27 mi (7,125.00 km) |
| Oak Ridge to Ceuti | 4,416.53 mi (7,107.71 km) |
| Oak Ridge to Cheste | 4,401.88 mi (7,084.13 km) |
| Oak Ridge to Chiclana de la Frontera | 4,225.33 mi (6,800.01 km) |
| Oak Ridge to Chipiona | 4,201.81 mi (6,762.15 km) |
| Oak Ridge to Chiva | 4,400.44 mi (7,081.82 km) |
| Oak Ridge to Churriana de la Vega | 4,328.19 mi (6,965.55 km) |
| Oak Ridge to Ciempozuelos | 4,241.09 mi (6,825.37 km) |
| Oak Ridge to Cieza | 4,404.45 mi (7,088.28 km) |
| Oak Ridge to Cisterniga | 4,149.44 mi (6,677.88 km) |
| Oak Ridge to Ciudad de Melilla | 4,420.84 mi (7,114.66 km) |
| Oak Ridge to Ciudad Real | 4,260.65 mi (6,856.85 km) |
| Oak Ridge to Ciudad-Rodrigo | 4,088.17 mi (6,579.27 km) |
