| Olbia to Romeoville (Illinois) | 4,758.73 mi (7,658.43 km) |
| Olbia to Romulus (Michigan) | 4,536.57 mi (7,300.91 km) |
| Olbia to Ronkonkoma (New York) | 4,139.08 mi (6,661.21 km) |
| Olbia to Roosevelt (New York) | 4,164.17 mi (6,701.58 km) |
| Olbia to Rosamond (California) | 6,237.70 mi (10,038.61 km) |
| Olbia to Rosaryville (Maryland) | 4,380.08 mi (7,049.06 km) |
| Olbia to Roscoe (Illinois) | 4,763.36 mi (7,665.89 km) |
| Olbia to Rose Hill (Virginia) | 4,392.14 mi (7,068.46 km) |
| Olbia to Roseburg (Oregon) | 5,925.00 mi (9,535.36 km) |
| Olbia to Rosedale (California) | 6,241.87 mi (10,045.31 km) |
| Olbia to Rosedale (Maryland) | 4,344.99 mi (6,992.59 km) |
| Olbia to Roselle (Illinois) | 4,743.81 mi (7,634.42 km) |
| Olbia to Roselle (New Jersey) | 4,195.68 mi (6,752.30 km) |
| Olbia to Roselle Park (New Jersey) | 4,195.54 mi (6,752.07 km) |
| Olbia to Rosemead (California) | 6,277.28 mi (10,102.31 km) |
