| Giffnock to Orangevale (California) | 4,935.73 mi (7,943.29 km) |
| Giffnock to Orchards (Washington) | 4,562.82 mi (7,343.15 km) |
| Giffnock to Orcutt (California) | 5,136.86 mi (8,266.98 km) |
| Giffnock to Oregon (Ohio) | 3,526.12 mi (5,674.75 km) |
| Giffnock to Oregon (Wisconsin) | 3,678.34 mi (5,919.71 km) |
| Giffnock to Oregon City (Oregon) | 4,584.61 mi (7,378.22 km) |
| Giffnock to Orem (Utah) | 4,560.13 mi (7,338.81 km) |
| Giffnock to Orinda (California) | 5,010.48 mi (8,063.58 km) |
| Giffnock to Orland Park (Illinois) | 3,689.14 mi (5,937.10 km) |
| Giffnock to Orlando (Florida) | 4,121.99 mi (6,633.70 km) |
| Giffnock to Ormond Beach (Florida) | 4,069.16 mi (6,548.69 km) |
| Giffnock to Oro Valley (Arizona) | 4,982.00 mi (8,017.75 km) |
| Giffnock to Oroville (California) | 4,897.83 mi (7,882.29 km) |
| Giffnock to Oshkosh (Wisconsin) | 3,595.29 mi (5,786.06 km) |
| Giffnock to Oskaloosa (Iowa) | 3,874.86 mi (6,235.98 km) |
