| Ostrow Mazowiecka to Oschatz | 387.43 mi (623.51 km) |
| Ostrow Mazowiecka to Oschersleben | 451.71 mi (726.96 km) |
| Ostrow Mazowiecka to Osnabruck | 582.19 mi (936.94 km) |
| Ostrow Mazowiecka to Ostbevern | 593.59 mi (955.30 km) |
| Ostrow Mazowiecka to Osterburg | 423.04 mi (680.81 km) |
| Ostrow Mazowiecka to Ostercappeln | 573.83 mi (923.50 km) |
| Ostrow Mazowiecka to Osterhofen | 479.93 mi (772.37 km) |
| Ostrow Mazowiecka to Osterholz-Scharmbeck | 544.61 mi (876.46 km) |
| Ostrow Mazowiecka to Osternienburg | 422.92 mi (680.62 km) |
| Ostrow Mazowiecka to Osterode | 497.51 mi (800.66 km) |
| Ostrow Mazowiecka to Osterwieck | 474.64 mi (763.86 km) |
| Ostrow Mazowiecka to Ostfildern | 618.95 mi (996.10 km) |
| Ostrow Mazowiecka to Osthofen | 623.38 mi (1,003.23 km) |
| Ostrow Mazowiecka to Ostrhauderfehn | 593.91 mi (955.80 km) |
| Ostrow Mazowiecka to Ostringen | 623.28 mi (1,003.08 km) |
