| Downers Grove to Opwijk | 4,147.11 mi (6,674.12 km) |
| Downers Grove to Ostend | 4,090.71 mi (6,583.37 km) |
| Downers Grove to Oud-Heverlee | 4,169.92 mi (6,710.83 km) |
| Downers Grove to Oud-Turnhout | 4,164.49 mi (6,702.10 km) |
| Downers Grove to Oudenaarde | 4,129.32 mi (6,645.49 km) |
| Downers Grove to Oudenburg | 4,095.20 mi (6,590.59 km) |
| Downers Grove to Oupeye | 4,210.85 mi (6,776.70 km) |
| Downers Grove to Overijse | 4,166.70 mi (6,705.66 km) |
| Downers Grove to Overpelt | 4,184.10 mi (6,733.66 km) |
| Downers Grove to Paal | 4,181.43 mi (6,729.36 km) |
| Downers Grove to Peer | 4,188.48 mi (6,740.71 km) |
| Downers Grove to Pepinster | 4,222.46 mi (6,795.40 km) |
| Downers Grove to Peruwelz | 4,140.36 mi (6,663.27 km) |
| Downers Grove to Perwez | 4,182.94 mi (6,731.79 km) |
| Downers Grove to Philippeville | 4,188.16 mi (6,740.20 km) |
