| Ridderkerk to Oststeinbek | 260.17 mi (418.70 km) |
| Ridderkerk to Ottendorf-Okrilla | 399.19 mi (642.43 km) |
| Ridderkerk to Ottersberg | 209.51 mi (337.17 km) |
| Ridderkerk to Ottobrunn | 409.03 mi (658.28 km) |
| Ridderkerk to Ottweiler | 206.12 mi (331.72 km) |
| Ridderkerk to Overath | 132.47 mi (213.20 km) |
| Ridderkerk to Oyten | 203.41 mi (327.36 km) |
| Ridderkerk to Paderborn | 177.80 mi (286.15 km) |
| Ridderkerk to Papenburg | 144.09 mi (231.88 km) |
| Ridderkerk to Parchim | 321.44 mi (517.31 km) |
| Ridderkerk to Pasewalk | 409.23 mi (658.59 km) |
| Ridderkerk to Passau | 452.68 mi (728.52 km) |
| Ridderkerk to Pattensen | 221.14 mi (355.89 km) |
| Ridderkerk to Pegnitz | 336.26 mi (541.15 km) |
| Ridderkerk to Peine | 241.12 mi (388.05 km) |
