| Llantwit Major to Decatur (Georgia) | 4,066.60 mi (6,544.56 km) |
| Llantwit Major to Decatur (Illinois) | 3,965.83 mi (6,382.39 km) |
| Llantwit Major to Deer Park (New York) | 3,295.28 mi (5,303.25 km) |
| Llantwit Major to Deer Park (Texas) | 4,711.11 mi (7,581.81 km) |
| Llantwit Major to Deerfield (Illinois) | 3,817.55 mi (6,143.76 km) |
| Llantwit Major to Deerfield Beach (Florida) | 4,256.92 mi (6,850.85 km) |
| Llantwit Major to Defiance (Ohio) | 3,720.82 mi (5,988.07 km) |
| Llantwit Major to DeForest (Wisconsin) | 3,826.63 mi (6,158.36 km) |
| Llantwit Major to DeKalb (Illinois) | 3,862.83 mi (6,216.63 km) |
| Llantwit Major to Del Aire (California) | 5,347.55 mi (8,606.05 km) |
| Llantwit Major to Del City (Oklahoma) | 4,510.56 mi (7,259.04 km) |
| Llantwit Major to Del Rio (Texas) | 4,956.98 mi (7,977.50 km) |
| Llantwit Major to DeLand (Florida) | 4,171.41 mi (6,713.23 km) |
| Llantwit Major to Delano (California) | 5,272.71 mi (8,485.60 km) |
| Llantwit Major to Delaware (Ohio) | 3,713.93 mi (5,976.99 km) |
