| North Branch to Oswego (Illinois) | 351.36 mi (565.47 km) |
| North Branch to Oswego (New York) | 822.28 mi (1,323.33 km) |
| North Branch to Otsego (Minnesota) | 36.31 mi (58.44 km) |
| North Branch to Ottawa (Illinois) | 354.24 mi (570.09 km) |
| North Branch to Ottawa (Kansas) | 492.06 mi (791.89 km) |
| North Branch to Ottumwa (Iowa) | 311.71 mi (501.65 km) |
| North Branch to Overland (Missouri) | 489.31 mi (787.47 km) |
| North Branch to Overland Park (Kansas) | 466.28 mi (750.41 km) |
| North Branch to Overlea (Maryland) | 937.50 mi (1,508.76 km) |
| North Branch to Oviedo (Florida) | 1,329.88 mi (2,140.23 km) |
| North Branch to Owasso (Oklahoma) | 654.72 mi (1,053.67 km) |
| North Branch to Owatonna (Minnesota) | 99.18 mi (159.61 km) |
| North Branch to Owensboro (Kentucky) | 614.59 mi (989.09 km) |
| North Branch to Owings Mills (Maryland) | 923.40 mi (1,486.07 km) |
| North Branch to Owosso (Michigan) | 467.91 mi (753.04 km) |
