| Northport to Oswego (Illinois) | 583.49 mi (939.04 km) |
| Northport to Oswego (New York) | 924.35 mi (1,487.60 km) |
| Northport to Otsego (Minnesota) | 889.30 mi (1,431.18 km) |
| Northport to Ottawa (Illinois) | 563.47 mi (906.82 km) |
| Northport to Ottawa (Kansas) | 565.34 mi (909.83 km) |
| Northport to Ottumwa (Iowa) | 598.07 mi (962.50 km) |
| Northport to Overland (Missouri) | 406.33 mi (653.93 km) |
| Northport to Overland Park (Kansas) | 554.53 mi (892.44 km) |
| Northport to Overlea (Maryland) | 746.51 mi (1,201.39 km) |
| Northport to Oviedo (Florida) | 495.16 mi (796.88 km) |
| Northport to Owasso (Oklahoma) | 511.69 mi (823.48 km) |
| Northport to Owatonna (Minnesota) | 807.25 mi (1,299.14 km) |
| Northport to Owensboro (Kentucky) | 312.02 mi (502.15 km) |
| Northport to Owings Mills (Maryland) | 735.74 mi (1,184.07 km) |
| Northport to Owosso (Michigan) | 697.84 mi (1,123.06 km) |
