| Olbia to Rockville (Maryland) | 4,383.24 mi (7,054.15 km) |
| Olbia to Rockville Centre (New York) | 4,167.18 mi (6,706.43 km) |
| Olbia to Rockwall (Texas) | 5,494.93 mi (8,843.23 km) |
| Olbia to Rocky Mount (North Carolina) | 4,531.01 mi (7,291.95 km) |
| Olbia to Rocky Point (New York) | 4,126.01 mi (6,640.17 km) |
| Olbia to Rocky River (Ohio) | 4,500.88 mi (7,243.46 km) |
| Olbia to Roessleville (New York) | 4,104.46 mi (6,605.49 km) |
| Olbia to Rogers (Arkansas) | 5,241.87 mi (8,435.98 km) |
| Olbia to Rogers (Minnesota) | 4,827.70 mi (7,769.43 km) |
| Olbia to Rohnert Park (California) | 6,185.53 mi (9,954.65 km) |
| Olbia to Rolla (Missouri) | 5,068.58 mi (8,157.10 km) |
| Olbia to Rolling Meadows (Illinois) | 4,737.44 mi (7,624.18 km) |
| Olbia to Roma (Texas) | 5,914.93 mi (9,519.16 km) |
| Olbia to Rome (Georgia) | 4,938.33 mi (7,947.47 km) |
| Olbia to Rome (New York) | 4,160.92 mi (6,696.35 km) |
