| Hauppauge to Olympia Heights (Florida) | 1,120.40 mi (1,803.11 km) |
| Hauppauge to Omaha (Nebraska) | 1,187.30 mi (1,910.78 km) |
| Hauppauge to On Top of the World Designated Place (Florida) | 957.52 mi (1,540.97 km) |
| Hauppauge to Onalaska (Wisconsin) | 940.96 mi (1,514.33 km) |
| Hauppauge to Oneida (New York) | 200.38 mi (322.48 km) |
| Hauppauge to Oneonta (New York) | 148.07 mi (238.30 km) |
| Hauppauge to Ontario (California) | 2,453.69 mi (3,948.83 km) |
| Hauppauge to Ontario (Oregon) | 2,216.81 mi (3,567.61 km) |
| Hauppauge to Opa-locka (Florida) | 1,107.22 mi (1,781.89 km) |
| Hauppauge to Opelika (Alabama) | 876.89 mi (1,411.22 km) |
| Hauppauge to Opelousas (Louisiana) | 1,271.51 mi (2,046.30 km) |
| Hauppauge to Orange (California) | 2,471.67 mi (3,977.76 km) |
| Hauppauge to Orange (Texas) | 1,367.05 mi (2,200.05 km) |
| Hauppauge to Orange City (Florida) | 939.21 mi (1,511.52 km) |
| Hauppauge to Orangeburg (South Carolina) | 658.30 mi (1,059.44 km) |
