| Seclin to Oestrich-Winkel | 222.70 mi (358.39 km) |
| Seclin to Offenburg | 262.77 mi (422.89 km) |
| Seclin to Oftersheim | 259.92 mi (418.30 km) |
| Seclin to Ohrdruf | 337.60 mi (543.32 km) |
| Seclin to Ohringen | 302.69 mi (487.14 km) |
| Seclin to Olbernhau | 451.52 mi (726.65 km) |
| Seclin to Olching | 406.31 mi (653.89 km) |
| Seclin to Oldenburg | 284.72 mi (458.21 km) |
| Seclin to Oldenburg in Holstein | 419.94 mi (675.84 km) |
| Seclin to Olfen | 205.27 mi (330.35 km) |
| Seclin to Olpe | 212.30 mi (341.67 km) |
| Seclin to Olsberg | 243.72 mi (392.23 km) |
| Seclin to Oranienburg | 462.89 mi (744.94 km) |
| Seclin to Ortenberg | 265.36 mi (427.06 km) |
| Seclin to Oschatz | 441.62 mi (710.73 km) |
