| Oudewater to Noventa Vicentina | 555.40 mi (893.83 km) |
| Oudewater to Novi di Modena | 564.07 mi (907.79 km) |
| Oudewater to Novi Ligure | 532.51 mi (856.99 km) |
| Oudewater to Nuoro | 835.76 mi (1,345.02 km) |
| Oudewater to Occhiobello | 578.18 mi (930.49 km) |
| Oudewater to Oderzo | 552.21 mi (888.70 km) |
| Oudewater to Oggiono | 476.17 mi (766.33 km) |
| Oudewater to Olbia | 797.58 mi (1,283.58 km) |
| Oudewater to Oleggio | 475.16 mi (764.70 km) |
| Oudewater to Olgiate Comasco | 469.03 mi (754.84 km) |
| Oudewater to Olgiate Olona | 477.21 mi (768.00 km) |
| Oudewater to Omegna | 453.40 mi (729.68 km) |
| Oudewater to Opera | 499.18 mi (803.36 km) |
| Oudewater to Oppeano | 545.86 mi (878.48 km) |
| Oudewater to Orbassano | 499.39 mi (803.70 km) |
