| Oostzaan to Oerlinghausen | 163.41 mi (262.98 km) |
| Oostzaan to Oestrich-Winkel | 215.50 mi (346.82 km) |
| Oostzaan to Offenburg | 305.08 mi (490.99 km) |
| Oostzaan to Oftersheim | 265.99 mi (428.07 km) |
| Oostzaan to Ohrdruf | 274.19 mi (441.27 km) |
| Oostzaan to Ohringen | 300.75 mi (484.01 km) |
| Oostzaan to Olbernhau | 382.75 mi (615.97 km) |
| Oostzaan to Olching | 407.27 mi (655.44 km) |
| Oostzaan to Oldenburg | 147.56 mi (237.47 km) |
| Oostzaan to Oldenburg in Holstein | 278.84 mi (448.75 km) |
| Oostzaan to Olfen | 117.14 mi (188.51 km) |
| Oostzaan to Olpe | 159.73 mi (257.06 km) |
| Oostzaan to Olsberg | 170.76 mi (274.81 km) |
| Oostzaan to Oranienburg | 351.12 mi (565.07 km) |
| Oostzaan to Ortenberg | 230.05 mi (370.23 km) |
