| Black Forest to Octeville | 4,732.25 mi (7,615.82 km) |
| Black Forest to Oignies | 4,861.80 mi (7,824.31 km) |
| Black Forest to Oissel | 4,842.64 mi (7,793.48 km) |
| Black Forest to Olivet | 4,934.46 mi (7,941.25 km) |
| Black Forest to Ollioules | 5,290.51 mi (8,514.25 km) |
| Black Forest to Olonne-sur-Mer | 4,853.05 mi (7,810.23 km) |
| Black Forest to Oloron-Sainte-Marie | 5,038.26 mi (8,108.29 km) |
| Black Forest to Onet Village | 5,112.09 mi (8,227.11 km) |
| Black Forest to Onnaing | 4,886.13 mi (7,863.47 km) |
| Black Forest to Orange | 5,206.02 mi (8,378.28 km) |
| Black Forest to Orchies | 4,870.21 mi (7,837.84 km) |
| Black Forest to Orleans | 4,933.12 mi (7,939.08 km) |
| Black Forest to Orly | 4,914.53 mi (7,909.18 km) |
| Black Forest to Ormesson-sur-Marne | 4,917.93 mi (7,914.65 km) |
| Black Forest to Orsay | 4,909.15 mi (7,900.51 km) |
