| Olbia to Clarkston (Georgia) | 4,914.26 mi (7,908.73 km) |
| Olbia to Clarksville (Indiana) | 4,795.66 mi (7,717.87 km) |
| Olbia to Clarksville (Tennessee) | 4,937.57 mi (7,946.25 km) |
| Olbia to Clawson (Michigan) | 4,515.37 mi (7,266.78 km) |
| Olbia to Clay (Alabama) | 5,026.93 mi (8,090.06 km) |
| Olbia to Clayton (California) | 6,185.34 mi (9,954.34 km) |
| Olbia to Clayton (Missouri) | 4,977.92 mi (8,011.18 km) |
| Olbia to Clayton (North Carolina) | 4,572.96 mi (7,359.46 km) |
| Olbia to Clayton (Ohio) | 4,670.50 mi (7,516.44 km) |
| Olbia to Clearfield (Utah) | 5,690.87 mi (9,158.57 km) |
| Olbia to Clearlake (California) | 6,148.64 mi (9,895.28 km) |
| Olbia to Clearwater (Florida) | 5,091.09 mi (8,193.31 km) |
| Olbia to Cleburne (Texas) | 5,562.99 mi (8,952.77 km) |
| Olbia to Clemmons (North Carolina) | 4,647.49 mi (7,479.41 km) |
| Olbia to Clemson (South Carolina) | 4,812.87 mi (7,745.56 km) |
