| Olbia to Crest Hill (Illinois) | 4,761.70 mi (7,663.22 km) |
| Olbia to Crestview (Florida) | 5,152.19 mi (8,291.65 km) |
| Olbia to Crestwood (Illinois) | 4,743.22 mi (7,633.48 km) |
| Olbia to Crestwood (Missouri) | 4,983.71 mi (8,020.51 km) |
| Olbia to Creve Coeur (Missouri) | 4,981.92 mi (8,017.62 km) |
| Olbia to Crofton (Maryland) | 4,364.27 mi (7,023.61 km) |
| Olbia to Crossville (Tennessee) | 4,860.90 mi (7,822.86 km) |
| Olbia to Crowley (Louisiana) | 5,440.41 mi (8,755.50 km) |
| Olbia to Crowley (Texas) | 5,550.18 mi (8,932.15 km) |
| Olbia to Crown Point (Indiana) | 4,736.27 mi (7,622.29 km) |
| Olbia to Crystal (Minnesota) | 4,825.72 mi (7,766.25 km) |
| Olbia to Crystal Lake (Illinois) | 4,743.70 mi (7,634.24 km) |
| Olbia to Cudahy (California) | 6,286.59 mi (10,117.29 km) |
| Olbia to Cudahy (Wisconsin) | 4,695.22 mi (7,556.22 km) |
| Olbia to Cullman (Alabama) | 5,016.81 mi (8,073.78 km) |
