| Gladbeck to Orzesze | 522.55 mi (840.97 km) |
| Gladbeck to Osowa | 516.85 mi (831.78 km) |
| Gladbeck to Ostroda | 563.81 mi (907.37 km) |
| Gladbeck to Ostroleka | 624.16 mi (1,004.50 km) |
| Gladbeck to Ostrow Mazowiecka | 637.16 mi (1,025.41 km) |
| Gladbeck to Ostrow Wielkopolski | 465.16 mi (748.61 km) |
| Gladbeck to Ostrowiec Swietokrzyski | 624.71 mi (1,005.37 km) |
| Gladbeck to Ostrzeszow | 471.45 mi (758.72 km) |
| Gladbeck to Oswiecim | 544.76 mi (876.70 km) |
| Gladbeck to Otwock | 610.63 mi (982.72 km) |
| Gladbeck to Ozarow Mazowiecki | 590.67 mi (950.59 km) |
| Gladbeck to Ozimek | 491.14 mi (790.42 km) |
| Gladbeck to Ozorkow | 526.74 mi (847.71 km) |
| Gladbeck to Pabianice | 532.18 mi (856.46 km) |
| Gladbeck to Parczew | 681.05 mi (1,096.04 km) |
