| Houthulst to Orzesze | 694.44 mi (1,117.59 km) |
| Houthulst to Osowa | 690.35 mi (1,111.01 km) |
| Houthulst to Ostroda | 740.54 mi (1,191.79 km) |
| Houthulst to Ostroleka | 802.15 mi (1,290.94 km) |
| Houthulst to Ostrow Mazowiecka | 815.35 mi (1,312.18 km) |
| Houthulst to Ostrow Wielkopolski | 642.56 mi (1,034.11 km) |
| Houthulst to Ostrowiec Swietokrzyski | 800.88 mi (1,288.90 km) |
| Houthulst to Ostrzeszow | 648.27 mi (1,043.29 km) |
| Houthulst to Oswiecim | 716.43 mi (1,152.98 km) |
| Houthulst to Otwock | 788.78 mi (1,269.42 km) |
| Houthulst to Ozarow Mazowiecki | 768.87 mi (1,237.38 km) |
| Houthulst to Ozimek | 665.27 mi (1,070.66 km) |
| Houthulst to Ozorkow | 704.73 mi (1,134.15 km) |
| Houthulst to Pabianice | 709.69 mi (1,142.13 km) |
| Houthulst to Parczew | 858.79 mi (1,382.08 km) |
