| Portchester to Oswego (Illinois) | 3,966.98 mi (6,384.24 km) |
| Portchester to Oswego (New York) | 3,422.54 mi (5,508.05 km) |
| Portchester to Otsego (Minnesota) | 4,000.27 mi (6,437.81 km) |
| Portchester to Ottawa (Illinois) | 4,000.93 mi (6,438.88 km) |
| Portchester to Ottawa (Kansas) | 4,379.01 mi (7,047.34 km) |
| Portchester to Ottumwa (Iowa) | 4,154.21 mi (6,685.55 km) |
| Portchester to Overland (Missouri) | 4,185.51 mi (6,735.94 km) |
| Portchester to Overland Park (Kansas) | 4,343.01 mi (6,989.40 km) |
| Portchester to Overlea (Maryland) | 3,596.77 mi (5,788.44 km) |
| Portchester to Oviedo (Florida) | 4,292.84 mi (6,908.67 km) |
| Portchester to Owasso (Oklahoma) | 4,515.07 mi (7,266.31 km) |
| Portchester to Owatonna (Minnesota) | 4,040.45 mi (6,502.48 km) |
| Portchester to Owensboro (Kentucky) | 4,101.35 mi (6,600.49 km) |
| Portchester to Owings Mills (Maryland) | 3,606.03 mi (5,803.34 km) |
| Portchester to Owosso (Michigan) | 3,746.50 mi (6,029.42 km) |
