| Holyhead to Pell City (Alabama) | 4,073.28 mi (6,555.31 km) |
| Holyhead to Pella (Iowa) | 3,942.53 mi (6,344.89 km) |
| Holyhead to Pembroke Pines (Florida) | 4,217.17 mi (6,786.88 km) |
| Holyhead to Pendleton (Oregon) | 4,578.05 mi (7,367.66 km) |
| Holyhead to Pensacola (Florida) | 4,267.98 mi (6,868.66 km) |
| Holyhead to Peoria (Arizona) | 5,032.13 mi (8,098.43 km) |
| Holyhead to Peoria (Illinois) | 3,850.84 mi (6,197.33 km) |
| Holyhead to Perris (California) | 5,196.80 mi (8,363.44 km) |
| Holyhead to Perry (Georgia) | 4,026.27 mi (6,479.65 km) |
| Holyhead to Perry Hall (Maryland) | 3,402.15 mi (5,475.23 km) |
| Holyhead to Perrysburg (Ohio) | 3,586.10 mi (5,771.28 km) |
| Holyhead to Perth Amboy (New Jersey) | 3,263.49 mi (5,252.08 km) |
| Holyhead to Peru (Indiana) | 3,715.92 mi (5,980.19 km) |
| Holyhead to Petal (Mississippi) | 4,303.12 mi (6,925.21 km) |
| Holyhead to Petaluma (California) | 5,111.07 mi (8,225.47 km) |
