| Riccione Marina to Oerlinghausen | 580.23 mi (933.78 km) |
| Riccione Marina to Oestrich-Winkel | 468.68 mi (754.27 km) |
| Riccione Marina to Offenburg | 382.02 mi (614.80 km) |
| Riccione Marina to Oftersheim | 417.97 mi (672.65 km) |
| Riccione Marina to Ohrdruf | 480.17 mi (772.76 km) |
| Riccione Marina to Ohringen | 389.07 mi (626.15 km) |
| Riccione Marina to Olbernhau | 461.73 mi (743.08 km) |
| Riccione Marina to Olching | 297.13 mi (478.18 km) |
| Riccione Marina to Oldenburg | 663.21 mi (1,067.33 km) |
| Riccione Marina to Oldenburg in Holstein | 716.07 mi (1,152.40 km) |
| Riccione Marina to Olfen | 586.04 mi (943.14 km) |
| Riccione Marina to Olpe | 534.11 mi (859.56 km) |
| Riccione Marina to Olsberg | 543.35 mi (874.43 km) |
| Riccione Marina to Oranienburg | 605.46 mi (974.40 km) |
| Riccione Marina to Ortenberg | 470.33 mi (756.93 km) |
