| Straelen to Oerlinghausen | 108.77 mi (175.05 km) |
| Straelen to Oestrich-Winkel | 125.63 mi (202.18 km) |
| Straelen to Offenburg | 219.02 mi (352.48 km) |
| Straelen to Oftersheim | 176.22 mi (283.59 km) |
| Straelen to Ohrdruf | 198.29 mi (319.11 km) |
| Straelen to Ohringen | 210.93 mi (339.46 km) |
| Straelen to Olbernhau | 311.49 mi (501.29 km) |
| Straelen to Olching | 317.81 mi (511.47 km) |
| Straelen to Oldenburg | 143.05 mi (230.22 km) |
| Straelen to Oldenburg in Holstein | 275.28 mi (443.02 km) |
| Straelen to Olfen | 51.36 mi (82.65 km) |
| Straelen to Olpe | 74.09 mi (119.24 km) |
| Straelen to Olsberg | 95.79 mi (154.17 km) |
| Straelen to Oranienburg | 309.10 mi (497.45 km) |
| Straelen to Ortenberg | 143.09 mi (230.28 km) |
