| Portchester to Oerlinghausen | 428.58 mi (689.73 km) |
| Portchester to Oestrich-Winkel | 405.41 mi (652.44 km) |
| Portchester to Offenburg | 436.59 mi (702.62 km) |
| Portchester to Oftersheim | 441.55 mi (710.61 km) |
| Portchester to Ohrdruf | 516.66 mi (831.48 km) |
| Portchester to Ohringen | 484.44 mi (779.64 km) |
| Portchester to Olbernhau | 630.89 mi (1,015.31 km) |
| Portchester to Olching | 586.09 mi (943.22 km) |
| Portchester to Oldenburg | 427.37 mi (687.79 km) |
| Portchester to Oldenburg in Holstein | 556.87 mi (896.19 km) |
| Portchester to Olfen | 372.22 mi (599.03 km) |
| Portchester to Olpe | 389.85 mi (627.40 km) |
| Portchester to Olsberg | 417.88 mi (672.51 km) |
| Portchester to Oranienburg | 626.40 mi (1,008.09 km) |
| Portchester to Ortenberg | 447.16 mi (719.64 km) |
