| Llantwit Major to Dardenne Prairie (Missouri) | 4,087.92 mi (6,578.88 km) |
| Llantwit Major to Darien (Illinois) | 3,841.70 mi (6,182.62 km) |
| Llantwit Major to Davenport (Iowa) | 3,951.50 mi (6,359.33 km) |
| Llantwit Major to Davidson (North Carolina) | 3,841.76 mi (6,182.71 km) |
| Llantwit Major to Davie (Florida) | 4,275.04 mi (6,880.02 km) |
| Llantwit Major to Davis (California) | 5,192.90 mi (8,357.16 km) |
| Llantwit Major to Dayton (Nevada) | 5,085.87 mi (8,184.92 km) |
| Llantwit Major to Dayton (Ohio) | 3,781.82 mi (6,086.25 km) |
| Llantwit Major to Daytona Beach (Florida) | 4,154.67 mi (6,686.30 km) |
| Llantwit Major to De Pere (Wisconsin) | 3,724.89 mi (5,994.62 km) |
| Llantwit Major to De Witt (New York) | 3,313.72 mi (5,332.91 km) |
| Llantwit Major to Dearborn (Michigan) | 3,629.58 mi (5,841.24 km) |
| Llantwit Major to Dearborn Heights (Michigan) | 3,631.94 mi (5,845.04 km) |
| Llantwit Major to DeBary (Florida) | 4,179.90 mi (6,726.90 km) |
| Llantwit Major to Decatur (Alabama) | 4,138.62 mi (6,660.47 km) |
