| Plymstock to Oerlinghausen | 563.05 mi (906.14 km) |
| Plymstock to Oestrich-Winkel | 534.93 mi (860.88 km) |
| Plymstock to Offenburg | 555.36 mi (893.77 km) |
| Plymstock to Oftersheim | 567.90 mi (913.95 km) |
| Plymstock to Ohrdruf | 649.89 mi (1,045.89 km) |
| Plymstock to Ohringen | 610.71 mi (982.84 km) |
| Plymstock to Olbernhau | 764.07 mi (1,229.66 km) |
| Plymstock to Olching | 708.89 mi (1,140.85 km) |
| Plymstock to Oldenburg | 559.55 mi (900.51 km) |
| Plymstock to Oldenburg in Holstein | 686.72 mi (1,105.17 km) |
| Plymstock to Olfen | 506.70 mi (815.46 km) |
| Plymstock to Olpe | 523.35 mi (842.25 km) |
| Plymstock to Olsberg | 552.02 mi (888.38 km) |
| Plymstock to Oranienburg | 760.55 mi (1,223.98 km) |
| Plymstock to Ortenberg | 578.72 mi (931.36 km) |
