| Leiden to Oerlinghausen | 177.89 mi (286.29 km) |
| Leiden to Oestrich-Winkel | 213.23 mi (343.16 km) |
| Leiden to Offenburg | 296.90 mi (477.82 km) |
| Leiden to Oftersheim | 262.91 mi (423.12 km) |
| Leiden to Ohrdruf | 283.77 mi (456.68 km) |
| Leiden to Ohringen | 299.77 mi (482.43 km) |
| Leiden to Olbernhau | 394.52 mi (634.93 km) |
| Leiden to Olching | 407.24 mi (655.38 km) |
| Leiden to Oldenburg | 170.22 mi (273.95 km) |
| Leiden to Oldenburg in Holstein | 302.79 mi (487.30 km) |
| Leiden to Olfen | 126.98 mi (204.36 km) |
| Leiden to Olpe | 163.80 mi (263.61 km) |
| Leiden to Olsberg | 179.70 mi (289.20 km) |
| Leiden to Oranienburg | 370.31 mi (595.96 km) |
| Leiden to Ortenberg | 233.40 mi (375.62 km) |
