| Skien to Oswego (Illinois) | 4,059.17 mi (6,532.60 km) |
| Skien to Oswego (New York) | 3,589.29 mi (5,776.40 km) |
| Skien to Otsego (Minnesota) | 4,015.75 mi (6,462.72 km) |
| Skien to Ottawa (Illinois) | 4,092.39 mi (6,586.07 km) |
| Skien to Ottawa (Kansas) | 4,442.88 mi (7,150.12 km) |
| Skien to Ottumwa (Iowa) | 4,219.79 mi (6,791.10 km) |
| Skien to Overland (Missouri) | 4,289.38 mi (6,903.09 km) |
| Skien to Overland Park (Kansas) | 4,409.18 mi (7,095.89 km) |
| Skien to Overlea (Maryland) | 3,807.92 mi (6,128.26 km) |
| Skien to Oviedo (Florida) | 4,562.60 mi (7,342.79 km) |
| Skien to Owasso (Oklahoma) | 4,593.86 mi (7,393.10 km) |
| Skien to Owatonna (Minnesota) | 4,070.41 mi (6,550.68 km) |
| Skien to Owensboro (Kentucky) | 4,240.97 mi (6,825.18 km) |
| Skien to Owings Mills (Maryland) | 3,814.46 mi (6,138.79 km) |
| Skien to Owosso (Michigan) | 3,858.39 mi (6,209.48 km) |
