| Groslay to Oestrich-Winkel | 263.22 mi (423.61 km) |
| Groslay to Offenburg | 257.19 mi (413.91 km) |
| Groslay to Oftersheim | 283.02 mi (455.47 km) |
| Groslay to Ohrdruf | 394.09 mi (634.22 km) |
| Groslay to Ohringen | 323.96 mi (521.37 km) |
| Groslay to Olbernhau | 502.85 mi (809.26 km) |
| Groslay to Olching | 413.36 mi (665.23 km) |
| Groslay to Oldenburg | 383.75 mi (617.58 km) |
| Groslay to Oldenburg in Holstein | 517.79 mi (833.30 km) |
| Groslay to Olfen | 291.31 mi (468.81 km) |
| Groslay to Olpe | 281.13 mi (452.44 km) |
| Groslay to Olsberg | 316.83 mi (509.88 km) |
| Groslay to Oranienburg | 540.82 mi (870.36 km) |
| Groslay to Ortenberg | 314.51 mi (506.15 km) |
| Groslay to Oschatz | 502.11 mi (808.07 km) |
