| Llantrisant to Dover (New Jersey) | 3,342.64 mi (5,379.45 km) |
| Llantrisant to Dover (Ohio) | 3,639.64 mi (5,857.43 km) |
| Llantrisant to Downers Grove (Illinois) | 3,840.56 mi (6,180.78 km) |
| Llantrisant to Downey (California) | 5,335.80 mi (8,587.14 km) |
| Llantrisant to Dranesville (Virginia) | 3,540.48 mi (5,697.86 km) |
| Llantrisant to Draper (Utah) | 4,766.64 mi (7,671.16 km) |
| Llantrisant to Drexel Heights (Arizona) | 5,190.37 mi (8,353.09 km) |
| Llantrisant to Drexel Hill (Pennsylvania) | 3,413.53 mi (5,493.54 km) |
| Llantrisant to Duarte (California) | 5,317.24 mi (8,557.27 km) |
| Llantrisant to Dublin (California) | 5,242.11 mi (8,436.36 km) |
| Llantrisant to Dublin (Georgia) | 4,071.00 mi (6,551.64 km) |
| Llantrisant to Dublin (Ohio) | 3,725.19 mi (5,995.11 km) |
| Llantrisant to Dubuque (Iowa) | 3,911.17 mi (6,294.42 km) |
| Llantrisant to Duluth (Georgia) | 4,050.75 mi (6,519.04 km) |
| Llantrisant to Duluth (Minnesota) | 3,770.04 mi (6,067.29 km) |
