| Mostoles to Oerlinghausen | 999.99 mi (1,609.32 km) |
| Mostoles to Oestrich-Winkel | 881.17 mi (1,418.11 km) |
| Mostoles to Offenburg | 807.66 mi (1,299.81 km) |
| Mostoles to Oftersheim | 870.68 mi (1,401.22 km) |
| Mostoles to Ohrdruf | 1,008.52 mi (1,623.06 km) |
| Mostoles to Ohringen | 894.93 mi (1,440.25 km) |
| Mostoles to Olbernhau | 1,092.33 mi (1,757.94 km) |
| Mostoles to Olching | 924.53 mi (1,487.89 km) |
| Mostoles to Oldenburg | 1,050.73 mi (1,690.99 km) |
| Mostoles to Oldenburg in Holstein | 1,181.71 mi (1,901.77 km) |
| Mostoles to Olfen | 951.50 mi (1,531.30 km) |
| Mostoles to Olpe | 927.10 mi (1,492.02 km) |
| Mostoles to Olsberg | 963.07 mi (1,549.91 km) |
| Mostoles to Oranienburg | 1,176.15 mi (1,892.83 km) |
| Mostoles to Ortenberg | 931.86 mi (1,499.69 km) |
