| Portchester to Orthez | 508.37 mi (818.14 km) |
| Portchester to Orvault | 247.73 mi (398.68 km) |
| Portchester to Osny | 187.56 mi (301.86 km) |
| Portchester to Ostwald | 425.00 mi (683.98 km) |
| Portchester to Ouistreham | 114.54 mi (184.34 km) |
| Portchester to Oullins | 446.68 mi (718.86 km) |
| Portchester to Outreau | 118.96 mi (191.44 km) |
| Portchester to Oyonnax | 442.86 mi (712.72 km) |
| Portchester to Ozoir-la-Ferriere | 221.41 mi (356.33 km) |
| Portchester to Pace | 188.45 mi (303.28 km) |
| Portchester to Palaiseau | 210.10 mi (338.12 km) |
| Portchester to Pamiers | 548.99 mi (883.51 km) |
| Portchester to Panazol | 363.20 mi (584.51 km) |
| Portchester to Pantin | 206.51 mi (332.35 km) |
| Portchester to Paray-le-Monial | 386.12 mi (621.40 km) |
