| Potomac to University Place (Washington) | 2,321.72 mi (3,736.45 km) |
| Potomac to Upland (California) | 2,252.26 mi (3,624.67 km) |
| Potomac to Upper Arlington (Ohio) | 320.85 mi (516.35 km) |
| Potomac to Upper Grand Lagoon (Florida) | 780.07 mi (1,255.40 km) |
| Potomac to Upper Montclair (New Jersey) | 202.79 mi (326.36 km) |
| Potomac to Urbana (Illinois) | 590.58 mi (950.44 km) |
| Potomac to Urbana (Maryland) | 23.05 mi (37.10 km) |
| Potomac to Urbana (Ohio) | 357.42 mi (575.21 km) |
| Potomac to Urbandale (Iowa) | 890.84 mi (1,433.67 km) |
| Potomac to Utica (New York) | 300.08 mi (482.94 km) |
| Potomac to Uvalde (Texas) | 1,452.85 mi (2,338.14 km) |
| Potomac to Vacaville (California) | 2,390.28 mi (3,846.78 km) |
| Potomac to Vadnais Heights (Minnesota) | 913.48 mi (1,470.10 km) |
| Potomac to Vail (Arizona) | 1,933.03 mi (3,110.91 km) |
| Potomac to Valdosta (Georgia) | 660.63 mi (1,063.18 km) |
