| Potomac to Trezzo sull'Adda | 4,231.96 mi (6,810.68 km) |
| Potomac to Tricase | 4,818.29 mi (7,754.30 km) |
| Potomac to Trieste | 4,410.33 mi (7,097.74 km) |
| Potomac to Triggiano | 4,711.37 mi (7,582.22 km) |
| Potomac to Trinitapoli | 4,665.13 mi (7,507.80 km) |
| Potomac to Trissino | 4,311.97 mi (6,939.45 km) |
| Potomac to Triuggio | 4,219.27 mi (6,790.25 km) |
| Potomac to Trofarello | 4,174.83 mi (6,718.73 km) |
| Potomac to Troina | 4,733.07 mi (7,617.14 km) |
| Potomac to Turin | 4,169.32 mi (6,709.87 km) |
| Potomac to Udine | 4,373.61 mi (7,038.64 km) |
| Potomac to Ugento | 4,809.56 mi (7,740.23 km) |
| Potomac to Umbertide | 4,430.68 mi (7,130.49 km) |
| Potomac to Urbino | 4,429.02 mi (7,127.82 km) |
| Potomac to Urgnano | 4,239.82 mi (6,823.32 km) |
