| Porthcawl to Indianola (Iowa) | 4,062.62 mi (6,538.15 km) |
| Porthcawl to Indio (California) | 5,275.54 mi (8,490.16 km) |
| Porthcawl to Inglewood (California) | 5,334.08 mi (8,584.38 km) |
| Porthcawl to Inkster (Michigan) | 3,623.92 mi (5,832.13 km) |
| Porthcawl to Inver Grove Heights (Minnesota) | 3,882.55 mi (6,248.37 km) |
| Porthcawl to Inwood (New York) | 3,308.68 mi (5,324.81 km) |
| Porthcawl to Iona (Florida) | 4,314.58 mi (6,943.64 km) |
| Porthcawl to Ionia (Michigan) | 3,662.84 mi (5,894.78 km) |
| Porthcawl to Iowa City (Iowa) | 3,971.66 mi (6,391.77 km) |
| Porthcawl to Irmo (South Carolina) | 3,911.89 mi (6,295.57 km) |
| Porthcawl to Irondale (Alabama) | 4,164.53 mi (6,702.16 km) |
| Porthcawl to Ironton (Ohio) | 3,766.79 mi (6,062.07 km) |
| Porthcawl to Irvine (California) | 5,330.73 mi (8,578.98 km) |
| Porthcawl to Irving (Texas) | 4,612.76 mi (7,423.52 km) |
| Porthcawl to Isabela (Puerto Rico) | 4,084.43 mi (6,573.26 km) |
