| Porthcawl to Hutchinson (Minnesota) | 3,927.93 mi (6,321.39 km) |
| Porthcawl to Hutto (Texas) | 4,754.12 mi (7,651.02 km) |
| Porthcawl to Hyattsville (Maryland) | 3,513.12 mi (5,653.82 km) |
| Porthcawl to Hybla Valley (Virginia) | 3,527.80 mi (5,677.45 km) |
| Porthcawl to Idaho Falls (Idaho) | 4,605.65 mi (7,412.09 km) |
| Porthcawl to Idylwood (Virginia) | 3,526.65 mi (5,675.60 km) |
| Porthcawl to Ilchester (Maryland) | 3,494.08 mi (5,623.17 km) |
| Porthcawl to Immokalee (Florida) | 4,296.36 mi (6,914.32 km) |
| Porthcawl to Imperial (California) | 5,302.68 mi (8,533.85 km) |
| Porthcawl to Imperial Beach (California) | 5,370.71 mi (8,643.32 km) |
| Porthcawl to Independence (Kentucky) | 3,823.19 mi (6,152.83 km) |
| Porthcawl to Independence (Missouri) | 4,201.46 mi (6,761.60 km) |
| Porthcawl to Indian Trail (North Carolina) | 3,843.38 mi (6,185.32 km) |
| Porthcawl to Indiana (Pennsylvania) | 3,530.36 mi (5,681.57 km) |
| Porthcawl to Indianapolis (Indiana) | 3,849.02 mi (6,194.40 km) |
