| Olbia to Commerce City (Colorado) | 5,499.00 mi (8,849.78 km) |
| Olbia to Compton (California) | 6,291.99 mi (10,125.98 km) |
| Olbia to Comstock Park (Michigan) | 4,601.35 mi (7,405.16 km) |
| Olbia to Concord (California) | 6,185.73 mi (9,954.97 km) |
| Olbia to Concord (Missouri) | 4,984.77 mi (8,022.22 km) |
| Olbia to Concord (New Hampshire) | 3,987.53 mi (6,417.32 km) |
| Olbia to Concord (North Carolina) | 4,684.39 mi (7,538.80 km) |
| Olbia to Conneaut (Ohio) | 4,428.16 mi (7,126.43 km) |
| Olbia to Connersville (Indiana) | 4,714.03 mi (7,586.51 km) |
| Olbia to Conroe (Texas) | 5,574.03 mi (8,970.53 km) |
| Olbia to Converse (Texas) | 5,736.29 mi (9,231.67 km) |
| Olbia to Conway (Arkansas) | 5,225.78 mi (8,410.08 km) |
| Olbia to Conway (Florida) | 5,000.36 mi (8,047.31 km) |
| Olbia to Conway (South Carolina) | 4,672.33 mi (7,519.39 km) |
| Olbia to Conyers (Georgia) | 4,909.23 mi (7,900.65 km) |
