| Millbrook to Oswego (Illinois) | 643.44 mi (1,035.51 km) |
| Millbrook to Oswego (New York) | 926.64 mi (1,491.29 km) |
| Millbrook to Otsego (Minnesota) | 963.13 mi (1,550.02 km) |
| Millbrook to Ottawa (Illinois) | 626.41 mi (1,008.11 km) |
| Millbrook to Ottawa (Kansas) | 653.01 mi (1,050.92 km) |
| Millbrook to Ottumwa (Iowa) | 676.50 mi (1,088.72 km) |
| Millbrook to Overland (Missouri) | 483.11 mi (777.49 km) |
| Millbrook to Overland Park (Kansas) | 641.47 mi (1,032.35 km) |
| Millbrook to Overlea (Maryland) | 726.36 mi (1,168.97 km) |
| Millbrook to Oviedo (Florida) | 407.01 mi (655.02 km) |
| Millbrook to Owasso (Oklahoma) | 598.88 mi (963.81 km) |
| Millbrook to Owatonna (Minnesota) | 882.02 mi (1,419.47 km) |
| Millbrook to Owensboro (Kentucky) | 365.49 mi (588.20 km) |
| Millbrook to Owings Mills (Maryland) | 716.90 mi (1,153.74 km) |
| Millbrook to Owosso (Michigan) | 734.78 mi (1,182.51 km) |
