| Porthcawl to Iselin (New Jersey) | 3,334.33 mi (5,366.09 km) |
| Porthcawl to Isla Vista (California) | 5,358.31 mi (8,623.36 km) |
| Porthcawl to Issaquah (Washington) | 4,685.69 mi (7,540.88 km) |
| Porthcawl to Ithaca (New York) | 3,344.72 mi (5,382.80 km) |
| Porthcawl to Ives Estates (Florida) | 4,266.57 mi (6,866.38 km) |
| Porthcawl to Jackson (Michigan) | 3,669.05 mi (5,904.76 km) |
| Porthcawl to Jackson (Mississippi) | 4,369.80 mi (7,032.51 km) |
| Porthcawl to Jackson (Missouri) | 4,100.53 mi (6,599.16 km) |
| Porthcawl to Jackson (Tennessee) | 4,150.76 mi (6,680.00 km) |
| Porthcawl to Jackson (Wyoming) | 4,565.49 mi (7,347.45 km) |
| Porthcawl to Jacksonville (Alabama) | 4,114.53 mi (6,621.69 km) |
| Porthcawl to Jacksonville (Arkansas) | 4,320.20 mi (6,952.69 km) |
| Porthcawl to Jacksonville (Florida) | 4,113.45 mi (6,619.96 km) |
| Porthcawl to Jacksonville (Illinois) | 4,011.86 mi (6,456.47 km) |
| Porthcawl to Jacksonville (North Carolina) | 3,723.40 mi (5,992.23 km) |
