| Humanes de Madrid to Oerlinghausen | 1,003.53 mi (1,615.03 km) |
| Humanes de Madrid to Oestrich-Winkel | 884.35 mi (1,423.22 km) |
| Humanes de Madrid to Offenburg | 810.38 mi (1,304.19 km) |
| Humanes de Madrid to Oftersheim | 873.57 mi (1,405.88 km) |
| Humanes de Madrid to Ohrdruf | 1,011.49 mi (1,627.84 km) |
| Humanes de Madrid to Ohringen | 897.61 mi (1,444.57 km) |
| Humanes de Madrid to Olbernhau | 1,094.91 mi (1,762.09 km) |
| Humanes de Madrid to Olching | 926.60 mi (1,491.22 km) |
| Humanes de Madrid to Oldenburg | 1,054.57 mi (1,697.17 km) |
| Humanes de Madrid to Oldenburg in Holstein | 1,185.41 mi (1,907.74 km) |
| Humanes de Madrid to Olfen | 955.20 mi (1,537.24 km) |
| Humanes de Madrid to Olpe | 930.56 mi (1,497.60 km) |
| Humanes de Madrid to Olsberg | 966.50 mi (1,555.44 km) |
| Humanes de Madrid to Oranienburg | 1,179.27 mi (1,897.85 km) |
| Humanes de Madrid to Ortenberg | 934.96 mi (1,504.68 km) |
