| Penarth to Dover (New Jersey) | 3,353.33 mi (5,396.66 km) |
| Penarth to Dover (Ohio) | 3,650.63 mi (5,875.13 km) |
| Penarth to Downers Grove (Illinois) | 3,851.87 mi (6,198.99 km) |
| Penarth to Downey (California) | 5,347.53 mi (8,606.01 km) |
| Penarth to Dranesville (Virginia) | 3,551.16 mi (5,715.04 km) |
| Penarth to Draper (Utah) | 4,778.37 mi (7,690.04 km) |
| Penarth to Drexel Heights (Arizona) | 5,201.99 mi (8,371.80 km) |
| Penarth to Drexel Hill (Pennsylvania) | 3,424.17 mi (5,510.67 km) |
| Penarth to Duarte (California) | 5,328.97 mi (8,576.15 km) |
| Penarth to Dublin (California) | 5,253.83 mi (8,455.22 km) |
| Penarth to Dublin (Georgia) | 4,081.49 mi (6,568.52 km) |
| Penarth to Dublin (Ohio) | 3,736.22 mi (6,012.87 km) |
| Penarth to Dubuque (Iowa) | 3,922.60 mi (6,312.82 km) |
| Penarth to Duluth (Georgia) | 4,061.42 mi (6,536.22 km) |
| Penarth to Duluth (Minnesota) | 3,781.65 mi (6,085.98 km) |
