| Gretna to Pontefract | 4,532.48 mi (7,294.33 km) |
| Gretna to Ponteland | 4,487.67 mi (7,222.21 km) |
| Gretna to Pontneddfechan | 4,481.90 mi (7,212.91 km) |
| Gretna to Pontypridd | 4,495.10 mi (7,234.16 km) |
| Gretna to Poole | 4,570.01 mi (7,354.73 km) |
| Gretna to Port Glasgow | 4,360.21 mi (7,017.07 km) |
| Gretna to Port Talbot | 4,476.61 mi (7,204.41 km) |
| Gretna to Portchester | 4,602.87 mi (7,407.60 km) |
| Gretna to Porthcawl | 4,483.32 mi (7,215.21 km) |
| Gretna to Portishead | 4,521.29 mi (7,276.32 km) |
| Gretna to Portlethen | 4,434.26 mi (7,136.26 km) |
| Gretna to Portsmouth | 4,605.05 mi (7,411.11 km) |
| Gretna to Potters Bar | 4,621.45 mi (7,437.51 km) |
| Gretna to Poulton le Fylde | 4,463.65 mi (7,183.55 km) |
| Gretna to Poynton | 4,508.15 mi (7,255.16 km) |
