| Llantrisant to Dardenne Prairie (Missouri) | 4,087.88 mi (6,578.81 km) |
| Llantrisant to Darien (Illinois) | 3,841.49 mi (6,182.28 km) |
| Llantrisant to Davenport (Iowa) | 3,951.04 mi (6,358.59 km) |
| Llantrisant to Davidson (North Carolina) | 3,843.37 mi (6,185.30 km) |
| Llantrisant to Davie (Florida) | 4,278.10 mi (6,884.93 km) |
| Llantrisant to Davis (California) | 5,189.38 mi (8,351.49 km) |
| Llantrisant to Dayton (Nevada) | 5,082.52 mi (8,179.53 km) |
| Llantrisant to Dayton (Ohio) | 3,782.34 mi (6,087.10 km) |
| Llantrisant to Daytona Beach (Florida) | 4,157.20 mi (6,690.36 km) |
| Llantrisant to De Pere (Wisconsin) | 3,724.21 mi (5,993.54 km) |
| Llantrisant to De Witt (New York) | 3,314.54 mi (5,334.24 km) |
| Llantrisant to Dearborn (Michigan) | 3,629.78 mi (5,841.57 km) |
| Llantrisant to Dearborn Heights (Michigan) | 3,632.14 mi (5,845.36 km) |
| Llantrisant to DeBary (Florida) | 4,182.44 mi (6,730.98 km) |
| Llantrisant to Decatur (Alabama) | 4,139.64 mi (6,662.11 km) |
