| Uniondale to Olympia (Washington) | 2,452.15 mi (3,946.35 km) |
| Uniondale to Olympia Heights (Florida) | 1,105.95 mi (1,779.85 km) |
| Uniondale to Omaha (Nebraska) | 1,168.61 mi (1,880.69 km) |
| Uniondale to On Top of the World Designated Place (Florida) | 940.22 mi (1,513.14 km) |
| Uniondale to Onalaska (Wisconsin) | 924.36 mi (1,487.61 km) |
| Uniondale to Oneida (New York) | 194.61 mi (313.19 km) |
| Uniondale to Oneonta (New York) | 142.11 mi (228.71 km) |
| Uniondale to Ontario (California) | 2,434.09 mi (3,917.29 km) |
| Uniondale to Ontario (Oregon) | 2,200.52 mi (3,541.40 km) |
| Uniondale to Opa-locka (Florida) | 1,092.78 mi (1,758.66 km) |
| Uniondale to Opelika (Alabama) | 856.49 mi (1,378.39 km) |
| Uniondale to Opelousas (Louisiana) | 1,250.44 mi (2,012.39 km) |
| Uniondale to Orange (California) | 2,452.03 mi (3,946.16 km) |
| Uniondale to Orange (Texas) | 1,345.88 mi (2,165.98 km) |
| Uniondale to Orange City (Florida) | 922.74 mi (1,485.00 km) |
