| Potomac to Ukiah (California) | 2,440.75 mi (3,928.01 km) |
| Potomac to Union (Missouri) | 744.11 mi (1,197.52 km) |
| Potomac to Union City (California) | 2,407.32 mi (3,874.20 km) |
| Potomac to Union City (Georgia) | 555.13 mi (893.39 km) |
| Potomac to Union City (New Jersey) | 206.80 mi (332.81 km) |
| Potomac to Union City (Tennessee) | 671.46 mi (1,080.61 km) |
| Potomac to Union Hill-Novelty Hill (Washington) | 2,296.29 mi (3,695.52 km) |
| Potomac to Union Park (Florida) | 758.06 mi (1,219.98 km) |
| Potomac to Uniondale (New York) | 224.23 mi (360.87 km) |
| Potomac to Universal City (Texas) | 1,366.40 mi (2,199.01 km) |
| Potomac to University (Florida) | 813.27 mi (1,308.83 km) |
| Potomac to University City (Missouri) | 706.80 mi (1,137.48 km) |
| Potomac to University Heights (Ohio) | 285.89 mi (460.09 km) |
| Potomac to University of California-Santa Barbara (California) | 2,362.52 mi (3,802.11 km) |
| Potomac to University Park (Texas) | 1,173.29 mi (1,888.23 km) |
