| Porthcawl to Decatur (Georgia) | 4,056.28 mi (6,527.95 km) |
| Porthcawl to Decatur (Illinois) | 3,955.29 mi (6,365.43 km) |
| Porthcawl to Deer Park (New York) | 3,284.98 mi (5,286.67 km) |
| Porthcawl to Deer Park (Texas) | 4,700.65 mi (7,564.97 km) |
| Porthcawl to Deerfield (Illinois) | 3,807.00 mi (6,126.77 km) |
| Porthcawl to Deerfield Beach (Florida) | 4,247.08 mi (6,835.01 km) |
| Porthcawl to Defiance (Ohio) | 3,710.30 mi (5,971.15 km) |
| Porthcawl to DeForest (Wisconsin) | 3,816.06 mi (6,141.35 km) |
| Porthcawl to DeKalb (Illinois) | 3,852.27 mi (6,199.63 km) |
| Porthcawl to Del Aire (California) | 5,337.16 mi (8,589.32 km) |
| Porthcawl to Del City (Oklahoma) | 4,500.00 mi (7,242.04 km) |
| Porthcawl to Del Rio (Texas) | 4,946.45 mi (7,960.54 km) |
| Porthcawl to DeLand (Florida) | 4,161.38 mi (6,697.09 km) |
| Porthcawl to Delano (California) | 5,262.38 mi (8,468.98 km) |
| Porthcawl to Delaware (Ohio) | 3,703.45 mi (5,960.12 km) |
