| Barstow to Opwijk | 5,517.43 mi (8,879.44 km) |
| Barstow to Ostend | 5,465.58 mi (8,796.00 km) |
| Barstow to Oud-Heverlee | 5,538.88 mi (8,913.97 km) |
| Barstow to Oud-Turnhout | 5,525.00 mi (8,891.62 km) |
| Barstow to Oudenaarde | 5,504.89 mi (8,859.27 km) |
| Barstow to Oudenburg | 5,470.13 mi (8,803.33 km) |
| Barstow to Oupeye | 5,575.05 mi (8,972.18 km) |
| Barstow to Overijse | 5,537.19 mi (8,911.24 km) |
| Barstow to Overpelt | 5,543.10 mi (8,920.76 km) |
| Barstow to Paal | 5,544.38 mi (8,922.81 km) |
| Barstow to Peer | 5,548.35 mi (8,929.20 km) |
| Barstow to Pepinster | 5,587.37 mi (8,992.00 km) |
| Barstow to Peruwelz | 5,520.41 mi (8,884.24 km) |
| Barstow to Perwez | 5,553.68 mi (8,937.79 km) |
| Barstow to Philippeville | 5,566.13 mi (8,957.82 km) |
