| Olbia to Coldwater (Michigan) | 4,616.42 mi (7,429.40 km) |
| Olbia to Colesville (Maryland) | 4,376.65 mi (7,043.53 km) |
| Olbia to College (Alaska) | 5,025.22 mi (8,087.31 km) |
| Olbia to College Park (Georgia) | 4,931.83 mi (7,937.01 km) |
| Olbia to College Park (Maryland) | 4,376.45 mi (7,043.22 km) |
| Olbia to College Station (Texas) | 5,597.60 mi (9,008.46 km) |
| Olbia to Collegedale (Tennessee) | 4,899.20 mi (7,884.50 km) |
| Olbia to Colleyville (Texas) | 5,526.53 mi (8,894.09 km) |
| Olbia to Collierville (Tennessee) | 5,106.41 mi (8,217.97 km) |
| Olbia to Collinsville (Illinois) | 4,962.82 mi (7,986.89 km) |
| Olbia to Colonia (New Jersey) | 4,200.27 mi (6,759.69 km) |
| Olbia to Colonial Heights (Virginia) | 4,462.55 mi (7,181.78 km) |
| Olbia to Colonial Park (Pennsylvania) | 4,322.86 mi (6,956.97 km) |
| Olbia to Colorado Springs (Colorado) | 5,545.13 mi (8,924.02 km) |
| Olbia to Colton (California) | 6,252.04 mi (10,061.68 km) |
