| Skien to Orangevale (California) | 5,111.39 mi (8,225.98 km) |
| Skien to Orchards (Washington) | 4,696.59 mi (7,558.43 km) |
| Skien to Orcutt (California) | 5,335.12 mi (8,586.04 km) |
| Skien to Oregon (Ohio) | 3,908.20 mi (6,289.64 km) |
| Skien to Oregon (Wisconsin) | 4,022.08 mi (6,472.91 km) |
| Skien to Oregon City (Oregon) | 4,719.70 mi (7,595.63 km) |
| Skien to Orem (Utah) | 4,790.05 mi (7,708.84 km) |
| Skien to Orinda (California) | 5,183.28 mi (8,341.68 km) |
| Skien to Orland Park (Illinois) | 4,048.81 mi (6,515.93 km) |
| Skien to Orlando (Florida) | 4,578.03 mi (7,367.63 km) |
| Skien to Ormond Beach (Florida) | 4,523.07 mi (7,279.17 km) |
| Skien to Oro Valley (Arizona) | 5,254.68 mi (8,456.59 km) |
| Skien to Oroville (California) | 5,067.45 mi (8,155.28 km) |
| Skien to Oshkosh (Wisconsin) | 3,936.53 mi (6,335.23 km) |
| Skien to Oskaloosa (Iowa) | 4,210.95 mi (6,776.86 km) |
