| Barlad to Oerlinghausen | 943.34 mi (1,518.16 km) |
| Barlad to Oestrich-Winkel | 941.10 mi (1,514.55 km) |
| Barlad to Offenburg | 934.18 mi (1,503.42 km) |
| Barlad to Oftersheim | 909.45 mi (1,463.61 km) |
| Barlad to Ohrdruf | 835.47 mi (1,344.56 km) |
| Barlad to Ohringen | 867.10 mi (1,395.46 km) |
| Barlad to Olbernhau | 723.77 mi (1,164.80 km) |
| Barlad to Olching | 778.01 mi (1,252.09 km) |
| Barlad to Oldenburg | 988.14 mi (1,590.26 km) |
| Barlad to Oldenburg in Holstein | 924.32 mi (1,487.55 km) |
| Barlad to Olfen | 991.28 mi (1,595.31 km) |
| Barlad to Olpe | 961.12 mi (1,546.77 km) |
| Barlad to Olsberg | 939.14 mi (1,511.40 km) |
| Barlad to Oranienburg | 787.36 mi (1,267.14 km) |
| Barlad to Ortenberg | 899.35 mi (1,447.37 km) |
