| Llanelli to Dixon (Illinois) | 3,859.99 mi (6,212.05 km) |
| Llanelli to Dobbs Ferry (New York) | 3,273.64 mi (5,268.42 km) |
| Llanelli to Doctor Phillips (Florida) | 4,176.02 mi (6,720.66 km) |
| Llanelli to Dodge City (Kansas) | 4,456.72 mi (7,172.40 km) |
| Llanelli to Dolton (Illinois) | 3,797.15 mi (6,110.91 km) |
| Llanelli to Donna (Texas) | 4,979.08 mi (8,013.06 km) |
| Llanelli to Dorado (Puerto Rico) | 4,036.82 mi (6,496.64 km) |
| Llanelli to Doral (Florida) | 4,259.57 mi (6,855.11 km) |
| Llanelli to Doraville (Georgia) | 4,025.27 mi (6,478.05 km) |
| Llanelli to Dothan (Alabama) | 4,202.32 mi (6,762.98 km) |
| Llanelli to Douglas (Arizona) | 5,144.57 mi (8,279.39 km) |
| Llanelli to Douglas (Georgia) | 4,082.75 mi (6,570.56 km) |
| Llanelli to Douglasville (Georgia) | 4,051.28 mi (6,519.91 km) |
| Llanelli to Dover (Delaware) | 3,421.66 mi (5,506.63 km) |
| Llanelli to Dover (New Hampshire) | 3,061.17 mi (4,926.48 km) |
