| Portchester to Oswaldtwistle | 207.52 mi (333.98 km) |
| Portchester to Oswestry | 162.00 mi (260.72 km) |
| Portchester to Otley | 212.98 mi (342.76 km) |
| Portchester to Ovenden | 202.99 mi (326.69 km) |
| Portchester to Oxford | 63.15 mi (101.63 km) |
| Portchester to Oxted | 56.24 mi (90.52 km) |
| Portchester to Padbury | 78.34 mi (126.08 km) |
| Portchester to Padiham | 210.27 mi (338.39 km) |
| Portchester to Paignton | 110.65 mi (178.08 km) |
| Portchester to Paisley | 371.50 mi (597.87 km) |
| Portchester to Palmers Green | 69.18 mi (111.33 km) |
| Portchester to Parkstone | 37.39 mi (60.18 km) |
| Portchester to Partick | 371.40 mi (597.72 km) |
| Portchester to Patcham | 42.34 mi (68.14 km) |
| Portchester to Peebles | 343.12 mi (552.20 km) |
