| Llantrisant to Dumas (Texas) | 4,660.47 mi (7,500.30 km) |
| Llantrisant to Dumont (New Jersey) | 3,316.76 mi (5,337.81 km) |
| Llantrisant to Duncan (Oklahoma) | 4,574.68 mi (7,362.24 km) |
| Llantrisant to Duncanville (Texas) | 4,631.93 mi (7,454.38 km) |
| Llantrisant to Dundalk (Maryland) | 3,492.28 mi (5,620.29 km) |
| Llantrisant to Dunedin (Florida) | 4,286.34 mi (6,898.19 km) |
| Llantrisant to Dunkirk (New York) | 3,468.39 mi (5,581.84 km) |
| Llantrisant to Dunmore (Pennsylvania) | 3,363.08 mi (5,412.35 km) |
| Llantrisant to Dunwoody (Georgia) | 4,060.51 mi (6,534.76 km) |
| Llantrisant to Durango (Colorado) | 4,802.00 mi (7,728.08 km) |
| Llantrisant to Durant (Oklahoma) | 4,543.04 mi (7,311.31 km) |
| Llantrisant to Durham (North Carolina) | 3,740.61 mi (6,019.93 km) |
| Llantrisant to Dyer (Indiana) | 3,834.43 mi (6,170.91 km) |
| Llantrisant to Dyersburg (Tennessee) | 4,164.58 mi (6,702.24 km) |
| Llantrisant to Eagan (Minnesota) | 3,896.04 mi (6,270.07 km) |
