| Llantwit Major to University Place (Washington) | 4,727.66 mi (7,608.44 km) |
| Llantwit Major to Upland (California) | 5,312.62 mi (8,549.83 km) |
| Llantwit Major to Upper Arlington (Ohio) | 3,725.36 mi (5,995.39 km) |
| Llantwit Major to Upper Grand Lagoon (Florida) | 4,302.16 mi (6,923.66 km) |
| Llantwit Major to Upper Montclair (New Jersey) | 3,328.22 mi (5,356.25 km) |
| Llantwit Major to Urbana (Illinois) | 3,925.11 mi (6,316.85 km) |
| Llantwit Major to Urbana (Maryland) | 3,523.31 mi (5,670.22 km) |
| Llantwit Major to Urbana (Ohio) | 3,749.12 mi (6,033.62 km) |
| Llantwit Major to Urbandale (Iowa) | 4,068.26 mi (6,547.23 km) |
| Llantwit Major to Utica (New York) | 3,276.30 mi (5,272.69 km) |
| Llantwit Major to Uvalde (Texas) | 4,921.76 mi (7,920.81 km) |
| Llantwit Major to Vacaville (California) | 5,211.15 mi (8,386.54 km) |
| Llantwit Major to Vadnais Heights (Minnesota) | 3,883.05 mi (6,249.17 km) |
| Llantwit Major to Vail (Arizona) | 5,185.89 mi (8,345.88 km) |
| Llantwit Major to Valdosta (Georgia) | 4,165.71 mi (6,704.06 km) |
