| Douai to Orzesze | 691.05 mi (1,112.13 km) |
| Douai to Osowa | 704.89 mi (1,134.41 km) |
| Douai to Ostroda | 751.59 mi (1,209.57 km) |
| Douai to Ostroleka | 810.45 mi (1,304.30 km) |
| Douai to Ostrow Mazowiecka | 822.66 mi (1,323.95 km) |
| Douai to Ostrow Wielkopolski | 645.55 mi (1,038.91 km) |
| Douai to Ostrowiec Swietokrzyski | 801.41 mi (1,289.75 km) |
| Douai to Ostrzeszow | 650.20 mi (1,046.40 km) |
| Douai to Oswiecim | 712.79 mi (1,147.12 km) |
| Douai to Otwock | 793.65 mi (1,277.26 km) |
| Douai to Ozarow Mazowiecki | 774.12 mi (1,245.83 km) |
| Douai to Ozimek | 663.94 mi (1,068.50 km) |
| Douai to Ozorkow | 709.05 mi (1,141.10 km) |
| Douai to Pabianice | 712.70 mi (1,146.98 km) |
| Douai to Parczew | 862.05 mi (1,387.34 km) |
