| Boadilla del Monte to Oberkirch | 812.41 mi (1,307.46 km) |
| Boadilla del Monte to Obernburg am Main | 907.15 mi (1,459.92 km) |
| Boadilla del Monte to Obernkirchen | 1,024.12 mi (1,648.16 km) |
| Boadilla del Monte to Oberschleissheim | 933.23 mi (1,501.89 km) |
| Boadilla del Monte to Oberstdorf | 852.63 mi (1,372.17 km) |
| Boadilla del Monte to Obertraubling | 981.90 mi (1,580.22 km) |
| Boadilla del Monte to Obertshausen | 907.36 mi (1,460.25 km) |
| Boadilla del Monte to Oberursel | 905.51 mi (1,457.27 km) |
| Boadilla del Monte to Ochsenfurt | 930.68 mi (1,497.79 km) |
| Boadilla del Monte to Ochsenhausen | 863.08 mi (1,388.99 km) |
| Boadilla del Monte to Ochtrup | 968.93 mi (1,559.34 km) |
| Boadilla del Monte to Odenthal | 903.55 mi (1,454.13 km) |
| Boadilla del Monte to Oelde | 974.50 mi (1,568.30 km) |
| Boadilla del Monte to Oelsnitz | 1,037.03 mi (1,668.94 km) |
| Boadilla del Monte to Oer-Erkenschwick | 939.78 mi (1,512.43 km) |
