| Harderwijk to Orzesze | 587.04 mi (944.76 km) |
| Harderwijk to Osowa | 547.90 mi (881.75 km) |
| Harderwijk to Ostroda | 602.53 mi (969.67 km) |
| Harderwijk to Ostroleka | 668.14 mi (1,075.26 km) |
| Harderwijk to Ostrow Mazowiecka | 682.97 mi (1,099.14 km) |
| Harderwijk to Ostrow Wielkopolski | 520.58 mi (837.80 km) |
| Harderwijk to Ostrowiec Swietokrzyski | 682.39 mi (1,098.20 km) |
| Harderwijk to Ostrzeszow | 528.58 mi (850.66 km) |
| Harderwijk to Oswiecim | 609.32 mi (980.61 km) |
| Harderwijk to Otwock | 661.15 mi (1,064.02 km) |
| Harderwijk to Ozarow Mazowiecki | 640.66 mi (1,031.04 km) |
| Harderwijk to Ozimek | 553.14 mi (890.20 km) |
| Harderwijk to Ozorkow | 579.03 mi (931.87 km) |
| Harderwijk to Pabianice | 586.70 mi (944.21 km) |
| Harderwijk to Parczew | 733.84 mi (1,181.00 km) |
