| Boadilla del Monte to Oerlinghausen | 995.93 mi (1,602.79 km) |
| Boadilla del Monte to Oestrich-Winkel | 877.37 mi (1,411.98 km) |
| Boadilla del Monte to Offenburg | 804.19 mi (1,294.21 km) |
| Boadilla del Monte to Oftersheim | 867.07 mi (1,395.42 km) |
| Boadilla del Monte to Ohrdruf | 1,004.86 mi (1,617.17 km) |
| Boadilla del Monte to Ohringen | 891.47 mi (1,434.69 km) |
| Boadilla del Monte to Olbernhau | 1,088.95 mi (1,752.49 km) |
| Boadilla del Monte to Olching | 921.53 mi (1,483.07 km) |
| Boadilla del Monte to Oldenburg | 1,046.48 mi (1,684.14 km) |
| Boadilla del Monte to Oldenburg in Holstein | 1,177.54 mi (1,895.07 km) |
| Boadilla del Monte to Olfen | 947.35 mi (1,524.61 km) |
| Boadilla del Monte to Olpe | 923.10 mi (1,485.58 km) |
| Boadilla del Monte to Olsberg | 959.08 mi (1,543.49 km) |
| Boadilla del Monte to Oranienburg | 1,172.38 mi (1,886.77 km) |
| Boadilla del Monte to Ortenberg | 928.11 mi (1,493.66 km) |
