| South Plainfield to Oskaloosa (Iowa) | 950.86 mi (1,530.26 km) |
| South Plainfield to Oswego (Illinois) | 727.78 mi (1,171.24 km) |
| South Plainfield to Oswego (New York) | 225.74 mi (363.30 km) |
| South Plainfield to Otsego (Minnesota) | 1,021.41 mi (1,643.79 km) |
| South Plainfield to Ottawa (Illinois) | 752.92 mi (1,211.71 km) |
| South Plainfield to Ottawa (Kansas) | 1,115.82 mi (1,795.74 km) |
| South Plainfield to Ottumwa (Iowa) | 940.51 mi (1,513.60 km) |
| South Plainfield to Overland (Missouri) | 857.53 mi (1,380.07 km) |
| South Plainfield to Overland Park (Kansas) | 1,081.05 mi (1,739.78 km) |
| South Plainfield to Overlea (Maryland) | 139.24 mi (224.08 km) |
| South Plainfield to Oviedo (Florida) | 908.22 mi (1,461.64 km) |
| South Plainfield to Owasso (Oklahoma) | 1,193.07 mi (1,920.06 km) |
| South Plainfield to Owatonna (Minnesota) | 988.88 mi (1,591.44 km) |
| South Plainfield to Owensboro (Kentucky) | 707.00 mi (1,137.81 km) |
| South Plainfield to Owings Mills (Maryland) | 149.26 mi (240.20 km) |
