| Portchester to Odessa (Texas) | 4,990.81 mi (8,031.93 km) |
| Portchester to Ogden (Utah) | 4,836.55 mi (7,783.67 km) |
| Portchester to Oildale (California) | 5,386.28 mi (8,668.38 km) |
| Portchester to Ojus (Florida) | 4,382.44 mi (7,052.86 km) |
| Portchester to Okemos (Michigan) | 3,768.53 mi (6,064.86 km) |
| Portchester to Oklahoma City (Oklahoma) | 4,620.98 mi (7,436.74 km) |
| Portchester to Okmulgee (Oklahoma) | 4,555.55 mi (7,331.46 km) |
| Portchester to Olathe (Kansas) | 4,348.25 mi (6,997.84 km) |
| Portchester to Old Jamestown (Missouri) | 4,175.43 mi (6,719.71 km) |
| Portchester to Oldsmar (Florida) | 4,385.96 mi (7,058.52 km) |
| Portchester to Olean (New York) | 3,557.83 mi (5,725.77 km) |
| Portchester to Olive Branch (Mississippi) | 4,344.74 mi (6,992.18 km) |
| Portchester to Olivehurst (California) | 5,256.91 mi (8,460.18 km) |
| Portchester to Olney (Maryland) | 3,629.23 mi (5,840.67 km) |
| Portchester to Olympia (Washington) | 4,841.35 mi (7,791.40 km) |
