| Boadilla del Monte to Opwijk | 825.66 mi (1,328.77 km) |
| Boadilla del Monte to Ostend | 815.13 mi (1,311.82 km) |
| Boadilla del Monte to Oud-Heverlee | 829.00 mi (1,334.15 km) |
| Boadilla del Monte to Oud-Turnhout | 864.51 mi (1,391.30 km) |
| Boadilla del Monte to Oudenaarde | 805.91 mi (1,296.98 km) |
| Boadilla del Monte to Oudenburg | 814.04 mi (1,310.07 km) |
| Boadilla del Monte to Oupeye | 846.18 mi (1,361.80 km) |
| Boadilla del Monte to Overijse | 822.94 mi (1,324.40 km) |
| Boadilla del Monte to Overpelt | 869.12 mi (1,398.71 km) |
| Boadilla del Monte to Paal | 853.03 mi (1,372.82 km) |
| Boadilla del Monte to Peer | 865.25 mi (1,392.48 km) |
| Boadilla del Monte to Pepinster | 842.92 mi (1,356.55 km) |
| Boadilla del Monte to Peruwelz | 785.54 mi (1,264.21 km) |
| Boadilla del Monte to Perwez | 820.52 mi (1,320.50 km) |
| Boadilla del Monte to Philippeville | 789.72 mi (1,270.93 km) |
