| Potomac to Tutzing | 4,231.90 mi (6,810.59 km) |
| Potomac to Twist | 3,924.08 mi (6,315.20 km) |
| Potomac to Twistringen | 3,981.46 mi (6,407.54 km) |
| Potomac to Ubach-Palenberg | 3,933.32 mi (6,330.06 km) |
| Potomac to Uberherrn | 4,003.10 mi (6,442.37 km) |
| Potomac to Uberlingen | 4,148.97 mi (6,677.12 km) |
| Potomac to Ubstadt-Weiher | 4,084.40 mi (6,573.20 km) |
| Potomac to Ueckermunde | 4,156.29 mi (6,688.90 km) |
| Potomac to Uelzen | 4,049.81 mi (6,517.53 km) |
| Potomac to Uetersen | 3,995.66 mi (6,430.40 km) |
| Potomac to Uetze | 4,050.37 mi (6,518.43 km) |
| Potomac to Uhingen | 4,137.74 mi (6,659.05 km) |
| Potomac to Ulm | 4,163.18 mi (6,699.99 km) |
| Potomac to Unna | 3,978.94 mi (6,403.49 km) |
| Potomac to Unterfohring | 4,238.02 mi (6,820.44 km) |
