| Haddington to Opwijk | 447.78 mi (720.63 km) |
| Haddington to Ostend | 401.54 mi (646.21 km) |
| Haddington to Oud-Heverlee | 467.91 mi (753.03 km) |
| Haddington to Oud-Turnhout | 451.06 mi (725.91 km) |
| Haddington to Oudenaarde | 439.56 mi (707.40 km) |
| Haddington to Oudenburg | 405.91 mi (653.25 km) |
| Haddington to Oupeye | 501.60 mi (807.24 km) |
| Haddington to Overijse | 467.09 mi (751.72 km) |
| Haddington to Overpelt | 468.75 mi (754.38 km) |
| Haddington to Paal | 470.89 mi (757.83 km) |
| Haddington to Peer | 474.11 mi (763.01 km) |
| Haddington to Pepinster | 513.98 mi (827.17 km) |
| Haddington to Peruwelz | 458.40 mi (737.72 km) |
| Haddington to Perwez | 483.32 mi (777.82 km) |
| Haddington to Philippeville | 500.18 mi (804.96 km) |
