| Houilles to Oestrich-Winkel | 271.21 mi (436.46 km) |
| Houilles to Offenburg | 263.81 mi (424.56 km) |
| Houilles to Oftersheim | 290.58 mi (467.64 km) |
| Houilles to Ohrdruf | 402.19 mi (647.26 km) |
| Houilles to Ohringen | 331.38 mi (533.31 km) |
| Houilles to Olbernhau | 510.83 mi (822.10 km) |
| Houilles to Olching | 420.11 mi (676.09 km) |
| Houilles to Oldenburg | 391.46 mi (629.99 km) |
| Houilles to Oldenburg in Holstein | 525.60 mi (845.87 km) |
| Houilles to Olfen | 299.34 mi (481.74 km) |
| Houilles to Olpe | 289.32 mi (465.62 km) |
| Houilles to Olsberg | 325.01 mi (523.05 km) |
| Houilles to Oranienburg | 549.00 mi (883.54 km) |
| Houilles to Ortenberg | 322.56 mi (519.11 km) |
| Houilles to Oschatz | 510.23 mi (821.13 km) |
