| Hoyo de Manzanares to Oerlinghausen | 983.01 mi (1,582.00 km) |
| Hoyo de Manzanares to Oestrich-Winkel | 865.19 mi (1,392.39 km) |
| Hoyo de Manzanares to Offenburg | 792.98 mi (1,276.17 km) |
| Hoyo de Manzanares to Oftersheim | 855.49 mi (1,376.77 km) |
| Hoyo de Manzanares to Ohrdruf | 993.10 mi (1,598.24 km) |
| Hoyo de Manzanares to Ohringen | 880.32 mi (1,416.74 km) |
| Hoyo de Manzanares to Olbernhau | 1,077.99 mi (1,734.85 km) |
| Hoyo de Manzanares to Olching | 911.72 mi (1,467.28 km) |
| Hoyo de Manzanares to Oldenburg | 1,033.00 mi (1,662.45 km) |
| Hoyo de Manzanares to Oldenburg in Holstein | 1,164.31 mi (1,873.78 km) |
| Hoyo de Manzanares to Olfen | 934.15 mi (1,503.38 km) |
| Hoyo de Manzanares to Olpe | 910.34 mi (1,465.05 km) |
| Hoyo de Manzanares to Olsberg | 946.38 mi (1,523.05 km) |
| Hoyo de Manzanares to Oranienburg | 1,160.30 mi (1,867.32 km) |
| Hoyo de Manzanares to Ortenberg | 916.10 mi (1,474.31 km) |
