| Donaueschingen to Orzesze | 487.72 mi (784.91 km) |
| Donaueschingen to Osowa | 620.48 mi (998.56 km) |
| Donaueschingen to Ostroda | 637.43 mi (1,025.84 km) |
| Donaueschingen to Ostroleka | 672.51 mi (1,082.30 km) |
| Donaueschingen to Ostrow Mazowiecka | 677.16 mi (1,089.79 km) |
| Donaueschingen to Ostrow Wielkopolski | 487.02 mi (783.78 km) |
| Donaueschingen to Ostrowiec Swietokrzyski | 613.90 mi (987.98 km) |
| Donaueschingen to Ostrzeszow | 484.21 mi (779.26 km) |
| Donaueschingen to Oswiecim | 506.28 mi (814.78 km) |
| Donaueschingen to Otwock | 634.10 mi (1,020.49 km) |
| Donaueschingen to Ozarow Mazowiecki | 618.53 mi (995.43 km) |
| Donaueschingen to Ozimek | 475.56 mi (765.35 km) |
| Donaueschingen to Ozorkow | 552.82 mi (889.68 km) |
| Donaueschingen to Pabianice | 547.56 mi (881.22 km) |
| Donaueschingen to Parczew | 687.82 mi (1,106.95 km) |
