| Olbia to Ukiah (California) | 6,155.17 mi (9,905.79 km) |
| Olbia to Union (Missouri) | 5,014.69 mi (8,070.37 km) |
| Olbia to Union City (California) | 6,207.26 mi (9,989.62 km) |
| Olbia to Union City (Georgia) | 4,938.11 mi (7,947.13 km) |
| Olbia to Union City (New Jersey) | 4,181.39 mi (6,729.29 km) |
| Olbia to Union City (Tennessee) | 5,018.24 mi (8,076.07 km) |
| Olbia to Union Hill-Novelty Hill (Washington) | 5,634.54 mi (9,067.91 km) |
| Olbia to Union Park (Florida) | 4,992.84 mi (8,035.19 km) |
| Olbia to Uniondale (New York) | 4,163.35 mi (6,700.26 km) |
| Olbia to Universal City (Texas) | 5,734.20 mi (9,228.31 km) |
| Olbia to University (Florida) | 5,071.12 mi (8,161.18 km) |
| Olbia to University City (Missouri) | 4,977.05 mi (8,009.79 km) |
| Olbia to University Heights (Ohio) | 4,486.24 mi (7,219.91 km) |
| Olbia to University of California-Santa Barbara (California) | 6,317.97 mi (10,167.79 km) |
| Olbia to University Park (Texas) | 5,513.27 mi (8,872.76 km) |
