| Olbia to River Ridge (Louisiana) | 5,354.32 mi (8,616.94 km) |
| Olbia to Riverbank (California) | 6,166.76 mi (9,924.44 km) |
| Olbia to Riverdale (Georgia) | 4,932.40 mi (7,937.93 km) |
| Olbia to Riverdale (Illinois) | 4,738.99 mi (7,626.67 km) |
| Olbia to Riverside (California) | 6,260.81 mi (10,075.80 km) |
| Olbia to Riverside (Ohio) | 4,664.94 mi (7,507.49 km) |
| Olbia to Riverton (Utah) | 5,719.57 mi (9,204.76 km) |
| Olbia to Riverton (Wyoming) | 5,467.74 mi (8,799.48 km) |
| Olbia to Riverview (Florida) | 5,075.63 mi (8,168.44 km) |
| Olbia to Riverview (Michigan) | 4,531.29 mi (7,292.41 km) |
| Olbia to Riviera Beach (Florida) | 5,011.65 mi (8,065.47 km) |
| Olbia to Riviera Beach (Maryland) | 4,351.82 mi (7,003.57 km) |
| Olbia to Roanoke (Virginia) | 4,578.97 mi (7,369.15 km) |
| Olbia to Roanoke Rapids (North Carolina) | 4,505.47 mi (7,250.86 km) |
| Olbia to Robbinsdale (Minnesota) | 4,825.20 mi (7,765.40 km) |
