| Olbia to Culpeper (Virginia) | 4,444.44 mi (7,152.63 km) |
| Olbia to Culver City (California) | 6,291.54 mi (10,125.25 km) |
| Olbia to Cumberland (Maryland) | 4,434.06 mi (7,135.93 km) |
| Olbia to Cupertino (California) | 6,224.46 mi (10,017.31 km) |
| Olbia to Cutler Bay (Florida) | 5,075.48 mi (8,168.19 km) |
| Olbia to Cutlerville (Michigan) | 4,609.22 mi (7,417.83 km) |
| Olbia to Cuyahoga Falls (Ohio) | 4,498.25 mi (7,239.23 km) |
| Olbia to Cypress (California) | 6,289.71 mi (10,122.31 km) |
| Olbia to Cypress Gardens (Florida) | 5,038.25 mi (8,108.27 km) |
| Olbia to Cypress Lake (Florida) | 5,110.89 mi (8,225.18 km) |
| Olbia to D'Iberville (Mississippi) | 5,271.26 mi (8,483.27 km) |
| Olbia to Dakota Ridge (Colorado) | 5,521.92 mi (8,886.67 km) |
| Olbia to Dale City (Virginia) | 4,408.13 mi (7,094.19 km) |
| Olbia to Dallas (Georgia) | 4,937.38 mi (7,945.95 km) |
| Olbia to Dallas (Oregon) | 5,826.37 mi (9,376.64 km) |
