| Holtsville to Ukiah (California) | 2,621.74 mi (4,219.28 km) |
| Holtsville to Union (Missouri) | 967.33 mi (1,556.76 km) |
| Holtsville to Union City (California) | 2,597.14 mi (4,179.70 km) |
| Holtsville to Union City (Georgia) | 805.35 mi (1,296.08 km) |
| Holtsville to Union City (New Jersey) | 51.76 mi (83.29 km) |
| Holtsville to Union City (Tennessee) | 913.86 mi (1,470.72 km) |
| Holtsville to Union Hill-Novelty Hill (Washington) | 2,428.46 mi (3,908.23 km) |
| Holtsville to Union Park (Florida) | 964.57 mi (1,552.33 km) |
| Holtsville to Uniondale (New York) | 29.52 mi (47.50 km) |
| Holtsville to Universal City (Texas) | 1,616.51 mi (2,601.52 km) |
| Holtsville to University (Florida) | 1,028.30 mi (1,654.89 km) |
| Holtsville to University City (Missouri) | 928.78 mi (1,494.72 km) |
| Holtsville to University Heights (Ohio) | 444.02 mi (714.59 km) |
| Holtsville to University of California-Santa Barbara (California) | 2,569.06 mi (4,134.50 km) |
| Holtsville to University Park (Texas) | 1,418.15 mi (2,282.30 km) |
