| Olbia to Camas (Washington) | 5,763.48 mi (9,275.43 km) |
| Olbia to Cambridge (Maryland) | 4,353.99 mi (7,007.07 km) |
| Olbia to Cambridge (Massachusetts) | 3,995.66 mi (6,430.39 km) |
| Olbia to Camden (Arkansas) | 5,309.82 mi (8,545.32 km) |
| Olbia to Camden (New Jersey) | 4,259.43 mi (6,854.89 km) |
| Olbia to Cameron Park (California) | 6,114.55 mi (9,840.42 km) |
| Olbia to Camp Pendleton South (California) | 6,299.56 mi (10,138.16 km) |
| Olbia to Camp Springs (Maryland) | 4,382.91 mi (7,053.61 km) |
| Olbia to Camp Verde (Arizona) | 6,028.95 mi (9,702.66 km) |
| Olbia to Campbell (California) | 6,223.67 mi (10,016.02 km) |
| Olbia to Campbellsville (Kentucky) | 4,817.64 mi (7,753.25 km) |
| Olbia to Campton Hills (Illinois) | 4,758.73 mi (7,658.43 km) |
| Olbia to Canby (Oregon) | 5,789.62 mi (9,317.49 km) |
| Olbia to Candelaria (Puerto Rico) | 4,659.56 mi (7,498.83 km) |
| Olbia to Candler-McAfee (Georgia) | 4,919.27 mi (7,916.80 km) |
