| Llantrisant to Decatur (Georgia) | 4,068.06 mi (6,546.92 km) |
| Llantrisant to Decatur (Illinois) | 3,965.82 mi (6,382.37 km) |
| Llantrisant to Deer Park (New York) | 3,296.85 mi (5,305.76 km) |
| Llantrisant to Deer Park (Texas) | 4,711.82 mi (7,582.94 km) |
| Llantrisant to Deerfield (Illinois) | 3,817.29 mi (6,143.33 km) |
| Llantrisant to Deerfield Beach (Florida) | 4,259.96 mi (6,855.74 km) |
| Llantrisant to Defiance (Ohio) | 3,721.07 mi (5,988.49 km) |
| Llantrisant to DeForest (Wisconsin) | 3,826.03 mi (6,157.39 km) |
| Llantrisant to DeKalb (Illinois) | 3,862.51 mi (6,216.10 km) |
| Llantrisant to Del Aire (California) | 5,344.89 mi (8,601.77 km) |
| Llantrisant to Del City (Oklahoma) | 4,510.21 mi (7,258.49 km) |
| Llantrisant to Del Rio (Texas) | 4,957.01 mi (7,977.53 km) |
| Llantrisant to DeLand (Florida) | 4,173.93 mi (6,717.29 km) |
| Llantrisant to Delano (California) | 5,269.76 mi (8,480.85 km) |
| Llantrisant to Delaware (Ohio) | 3,714.50 mi (5,977.90 km) |
