| Prestonpans to Oswego (Illinois) | 3,745.82 mi (6,028.31 km) |
| Prestonpans to Oswego (New York) | 3,230.89 mi (5,199.61 km) |
| Prestonpans to Otsego (Minnesota) | 3,748.94 mi (6,033.33 km) |
| Prestonpans to Ottawa (Illinois) | 3,779.65 mi (6,082.76 km) |
| Prestonpans to Ottawa (Kansas) | 4,148.37 mi (6,676.16 km) |
| Prestonpans to Ottumwa (Iowa) | 3,923.14 mi (6,313.69 km) |
| Prestonpans to Overland (Missouri) | 3,970.41 mi (6,389.75 km) |
| Prestonpans to Overland Park (Kansas) | 4,113.12 mi (6,619.43 km) |
| Prestonpans to Overlea (Maryland) | 3,427.28 mi (5,515.67 km) |
| Prestonpans to Oviedo (Florida) | 4,156.42 mi (6,689.11 km) |
| Prestonpans to Owasso (Oklahoma) | 4,291.13 mi (6,905.90 km) |
| Prestonpans to Owatonna (Minnesota) | 3,794.81 mi (6,107.16 km) |
| Prestonpans to Owensboro (Kentucky) | 3,901.31 mi (6,278.54 km) |
| Prestonpans to Owings Mills (Maryland) | 3,435.26 mi (5,528.52 km) |
| Prestonpans to Owosso (Michigan) | 3,532.43 mi (5,684.90 km) |
