| Olbia to Richmond (California) | 6,197.50 mi (9,973.91 km) |
| Olbia to Richmond (Indiana) | 4,696.23 mi (7,557.85 km) |
| Olbia to Richmond (Kentucky) | 4,755.11 mi (7,652.61 km) |
| Olbia to Richmond (Texas) | 5,620.67 mi (9,045.60 km) |
| Olbia to Richmond (Virginia) | 4,456.12 mi (7,171.44 km) |
| Olbia to Richmond Heights (Florida) | 5,074.80 mi (8,167.10 km) |
| Olbia to Richmond Heights (Ohio) | 4,482.42 mi (7,213.75 km) |
| Olbia to Richmond Hill (Georgia) | 4,857.57 mi (7,817.51 km) |
| Olbia to Richmond West (Florida) | 5,078.65 mi (8,173.30 km) |
| Olbia to Richton Park (Illinois) | 4,749.90 mi (7,644.23 km) |
| Olbia to Ridge (New York) | 4,124.52 mi (6,637.78 km) |
| Olbia to Ridgecrest (California) | 6,176.69 mi (9,940.42 km) |
| Olbia to Ridgefield (New Jersey) | 4,178.36 mi (6,724.42 km) |
| Olbia to Ridgefield (Washington) | 5,758.94 mi (9,268.12 km) |
| Olbia to Ridgefield Park (New Jersey) | 4,177.80 mi (6,723.52 km) |
