| Porthcawl to Dallas (Texas) | 4,608.06 mi (7,415.95 km) |
| Porthcawl to Dalton (Georgia) | 4,036.30 mi (6,495.80 km) |
| Porthcawl to Daly City (California) | 5,254.73 mi (8,456.66 km) |
| Porthcawl to Damascus (Maryland) | 3,509.45 mi (5,647.91 km) |
| Porthcawl to Damascus (Oregon) | 4,815.38 mi (7,749.60 km) |
| Porthcawl to Dana Point (California) | 5,339.58 mi (8,593.23 km) |
| Porthcawl to Danbury (Connecticut) | 3,264.28 mi (5,253.35 km) |
| Porthcawl to Dania Beach (Florida) | 4,260.93 mi (6,857.30 km) |
| Porthcawl to Danville (California) | 5,232.17 mi (8,420.37 km) |
| Porthcawl to Danville (Illinois) | 3,890.08 mi (6,260.48 km) |
| Porthcawl to Danville (Indiana) | 3,864.00 mi (6,218.51 km) |
| Porthcawl to Danville (Kentucky) | 3,892.90 mi (6,265.02 km) |
| Porthcawl to Danville (Virginia) | 3,721.86 mi (5,989.75 km) |
| Porthcawl to Daphne (Alabama) | 4,358.10 mi (7,013.69 km) |
| Porthcawl to Darby (Pennsylvania) | 3,401.18 mi (5,473.67 km) |
