| Boise to Opwijk | 4,992.22 mi (8,034.20 km) |
| Boise to Ostend | 4,942.53 mi (7,954.23 km) |
| Boise to Oud-Heverlee | 5,012.96 mi (8,067.58 km) |
| Boise to Oud-Turnhout | 4,996.54 mi (8,041.16 km) |
| Boise to Oudenaarde | 4,981.57 mi (8,017.06 km) |
| Boise to Oudenburg | 4,947.04 mi (7,961.49 km) |
| Boise to Oupeye | 5,047.16 mi (8,122.61 km) |
| Boise to Overijse | 5,011.79 mi (8,065.69 km) |
| Boise to Overpelt | 5,013.95 mi (8,069.17 km) |
| Boise to Paal | 5,016.46 mi (8,073.21 km) |
| Boise to Peer | 5,019.41 mi (8,077.95 km) |
| Boise to Pepinster | 5,059.54 mi (8,142.55 km) |
| Boise to Peruwelz | 4,998.39 mi (8,044.14 km) |
| Boise to Perwez | 5,028.16 mi (8,092.04 km) |
| Boise to Philippeville | 5,042.84 mi (8,115.67 km) |
