| Olbia to Orangevale (California) | 6,120.98 mi (9,850.76 km) |
| Olbia to Orchards (Washington) | 5,761.18 mi (9,271.72 km) |
| Olbia to Orcutt (California) | 6,311.17 mi (10,156.85 km) |
| Olbia to Oregon (Ohio) | 4,561.57 mi (7,341.13 km) |
| Olbia to Oregon (Wisconsin) | 4,758.16 mi (7,657.52 km) |
| Olbia to Oregon City (Oregon) | 5,782.67 mi (9,306.30 km) |
| Olbia to Orem (Utah) | 5,722.04 mi (9,208.74 km) |
| Olbia to Orinda (California) | 6,196.41 mi (9,972.15 km) |
| Olbia to Orland Park (Illinois) | 4,749.86 mi (7,644.15 km) |
| Olbia to Orlando (Florida) | 5,001.44 mi (8,049.05 km) |
| Olbia to Ormond Beach (Florida) | 4,955.65 mi (7,975.35 km) |
| Olbia to Oro Valley (Arizona) | 6,109.04 mi (9,831.55 km) |
| Olbia to Oroville (California) | 6,085.44 mi (9,793.58 km) |
| Olbia to Oshkosh (Wisconsin) | 4,679.75 mi (7,531.33 km) |
| Olbia to Oskaloosa (Iowa) | 4,958.95 mi (7,980.66 km) |
