| Rockwall to Ukiah (California) | 1,550.21 mi (2,494.83 km) |
| Rockwall to Union (Missouri) | 488.66 mi (786.43 km) |
| Rockwall to Union City (California) | 1,474.14 mi (2,372.40 km) |
| Rockwall to Union City (Georgia) | 687.30 mi (1,106.11 km) |
| Rockwall to Union City (New Jersey) | 1,347.41 mi (2,168.44 km) |
| Rockwall to Union City (Tennessee) | 484.70 mi (780.05 km) |
| Rockwall to Union Hill-Novelty Hill (Washington) | 1,677.58 mi (2,699.80 km) |
| Rockwall to Union Park (Florida) | 950.42 mi (1,529.55 km) |
| Rockwall to Uniondale (New York) | 1,368.44 mi (2,202.29 km) |
| Rockwall to Universal City (Texas) | 257.38 mi (414.22 km) |
| Rockwall to University (Florida) | 897.31 mi (1,444.08 km) |
| Rockwall to University City (Missouri) | 524.01 mi (843.31 km) |
| Rockwall to University Heights (Ohio) | 1,009.45 mi (1,624.55 km) |
| Rockwall to University of California-Santa Barbara (California) | 1,347.72 mi (2,168.94 km) |
| Rockwall to University Park (Texas) | 21.17 mi (34.08 km) |
