| Porthcawl to Hilliard (Ohio) | 3,718.03 mi (5,983.59 km) |
| Porthcawl to Hillsboro (Oregon) | 4,823.38 mi (7,762.48 km) |
| Porthcawl to Hillsborough (California) | 5,258.71 mi (8,463.08 km) |
| Porthcawl to Hillsborough (New Jersey) | 3,350.85 mi (5,392.68 km) |
| Porthcawl to Hilo (Hawaii) | 7,223.70 mi (11,625.42 km) |
| Porthcawl to Hilton Head Island (South Carolina) | 3,984.48 mi (6,412.40 km) |
| Porthcawl to Hinesville (Georgia) | 4,038.32 mi (6,499.05 km) |
| Porthcawl to Hinsdale (Illinois) | 3,826.48 mi (6,158.12 km) |
| Porthcawl to Hobart (Indiana) | 3,814.06 mi (6,138.13 km) |
| Porthcawl to Hobbs (New Mexico) | 4,858.50 mi (7,818.99 km) |
| Porthcawl to Hobe Sound (Florida) | 4,209.35 mi (6,774.30 km) |
| Porthcawl to Hoboken (New Jersey) | 3,314.93 mi (5,334.86 km) |
| Porthcawl to Hockessin (Delaware) | 3,424.50 mi (5,511.21 km) |
| Porthcawl to Hoffman Estates (Illinois) | 3,823.01 mi (6,152.54 km) |
| Porthcawl to Holbrook (New York) | 3,273.20 mi (5,267.70 km) |
