| Uniondale to Odenton (Maryland) | 200.01 mi (321.88 km) |
| Uniondale to Odessa (Texas) | 1,703.95 mi (2,742.24 km) |
| Uniondale to Ogden (Utah) | 1,985.66 mi (3,195.60 km) |
| Uniondale to Oildale (California) | 2,470.44 mi (3,975.80 km) |
| Uniondale to Ojus (Florida) | 1,087.19 mi (1,749.66 km) |
| Uniondale to Okemos (Michigan) | 574.23 mi (924.13 km) |
| Uniondale to Oklahoma City (Oklahoma) | 1,345.54 mi (2,165.43 km) |
| Uniondale to Okmulgee (Oklahoma) | 1,263.57 mi (2,033.51 km) |
| Uniondale to Olathe (Kansas) | 1,131.02 mi (1,820.19 km) |
| Uniondale to Old Jamestown (Missouri) | 894.29 mi (1,439.22 km) |
| Uniondale to Oldsmar (Florida) | 1,015.36 mi (1,634.06 km) |
| Uniondale to Olean (New York) | 267.80 mi (430.98 km) |
| Uniondale to Olive Branch (Mississippi) | 969.93 mi (1,560.96 km) |
| Uniondale to Olivehurst (California) | 2,512.88 mi (4,044.09 km) |
| Uniondale to Olney (Maryland) | 213.79 mi (344.05 km) |
