| Grinon to Ponteland | 1,029.29 mi (1,656.48 km) |
| Grinon to Pontneddfechan | 797.34 mi (1,283.20 km) |
| Grinon to Pontypridd | 787.02 mi (1,266.59 km) |
| Grinon to Poole | 731.03 mi (1,176.48 km) |
| Grinon to Port Glasgow | 1,086.63 mi (1,748.77 km) |
| Grinon to Port Talbot | 785.86 mi (1,264.73 km) |
| Grinon to Portchester | 745.80 mi (1,200.24 km) |
| Grinon to Porthcawl | 778.26 mi (1,252.48 km) |
| Grinon to Portishead | 780.23 mi (1,255.66 km) |
| Grinon to Portlethen | 1,166.38 mi (1,877.11 km) |
| Grinon to Portsmouth | 743.62 mi (1,196.74 km) |
| Grinon to Potters Bar | 812.33 mi (1,307.31 km) |
| Grinon to Poulton le Fylde | 942.60 mi (1,516.98 km) |
| Grinon to Poynton | 911.05 mi (1,466.19 km) |
| Grinon to Prescot | 914.16 mi (1,471.20 km) |
