| Leek to Oswego (Illinois) | 3,862.11 mi (6,215.47 km) |
| Leek to Oswego (New York) | 3,329.60 mi (5,358.47 km) |
| Leek to Otsego (Minnesota) | 3,882.70 mi (6,248.60 km) |
| Leek to Ottawa (Illinois) | 3,896.05 mi (6,270.09 km) |
| Leek to Ottawa (Kansas) | 4,270.48 mi (6,872.67 km) |
| Leek to Ottumwa (Iowa) | 4,045.31 mi (6,510.30 km) |
| Leek to Overland (Missouri) | 4,083.42 mi (6,571.63 km) |
| Leek to Overland Park (Kansas) | 4,234.76 mi (6,815.19 km) |
| Leek to Overlea (Maryland) | 3,513.53 mi (5,654.47 km) |
| Leek to Oviedo (Florida) | 4,224.74 mi (6,799.07 km) |
| Leek to Owasso (Oklahoma) | 4,409.49 mi (7,096.39 km) |
| Leek to Owatonna (Minnesota) | 3,925.31 mi (6,317.17 km) |
| Leek to Owensboro (Kentucky) | 4,005.61 mi (6,446.40 km) |
| Leek to Owings Mills (Maryland) | 3,522.25 mi (5,668.52 km) |
| Leek to Owosso (Michigan) | 3,644.43 mi (5,865.14 km) |
