| Usak to Opwijk | 1,487.65 mi (2,394.14 km) |
| Usak to Ostend | 1,544.99 mi (2,486.42 km) |
| Usak to Oud-Heverlee | 1,464.66 mi (2,357.15 km) |
| Usak to Oud-Turnhout | 1,467.07 mi (2,361.02 km) |
| Usak to Oudenaarde | 1,507.45 mi (2,426.01 km) |
| Usak to Oudenburg | 1,540.61 mi (2,479.38 km) |
| Usak to Oupeye | 1,422.53 mi (2,289.33 km) |
| Usak to Overijse | 1,468.46 mi (2,363.26 km) |
| Usak to Overpelt | 1,447.24 mi (2,329.11 km) |
| Usak to Paal | 1,451.10 mi (2,335.31 km) |
| Usak to Peer | 1,443.16 mi (2,322.54 km) |
| Usak to Pepinster | 1,411.35 mi (2,271.35 km) |
| Usak to Peruwelz | 1,498.94 mi (2,412.31 km) |
| Usak to Perwez | 1,452.63 mi (2,337.79 km) |
| Usak to Philippeville | 1,451.14 mi (2,335.39 km) |
