| Greenock to Ponteland | 133.53 mi (214.90 km) |
| Greenock to Pontneddfechan | 293.75 mi (472.75 km) |
| Greenock to Pontypridd | 305.97 mi (492.41 km) |
| Greenock to Poole | 379.28 mi (610.40 km) |
| Greenock to Port Glasgow | 3.08 mi (4.96 km) |
| Greenock to Port Talbot | 303.77 mi (488.87 km) |
| Greenock to Portchester | 383.42 mi (617.05 km) |
| Greenock to Porthcawl | 311.95 mi (502.03 km) |
| Greenock to Portishead | 319.21 mi (513.72 km) |
| Greenock to Portlethen | 126.43 mi (203.46 km) |
| Greenock to Portsmouth | 386.27 mi (621.64 km) |
| Greenock to Potters Bar | 348.01 mi (560.07 km) |
| Greenock to Poulton le Fylde | 161.41 mi (259.77 km) |
| Greenock to Poynton | 208.48 mi (335.52 km) |
| Greenock to Prescot | 190.95 mi (307.30 km) |
