| Ostrow Mazowiecka to Kluczbork | 201.01 mi (323.50 km) |
| Ostrow Mazowiecka to Knurow | 225.77 mi (363.34 km) |
| Ostrow Mazowiecka to Kobylka | 43.64 mi (70.22 km) |
| Ostrow Mazowiecka to Kokoszki | 176.27 mi (283.68 km) |
| Ostrow Mazowiecka to Kolbuszowa | 176.28 mi (283.70 km) |
| Ostrow Mazowiecka to Kolno | 42.21 mi (67.93 km) |
| Ostrow Mazowiecka to Kolo | 143.50 mi (230.95 km) |
| Ostrow Mazowiecka to Kolobrzeg | 276.70 mi (445.30 km) |
| Ostrow Mazowiecka to Koluszki | 114.64 mi (184.50 km) |
| Ostrow Mazowiecka to Komorniki | 221.59 mi (356.61 km) |
| Ostrow Mazowiecka to Konin | 158.00 mi (254.27 km) |
| Ostrow Mazowiecka to Konskie | 127.28 mi (204.84 km) |
| Ostrow Mazowiecka to Konstancin-Jeziorna | 59.50 mi (95.76 km) |
| Ostrow Mazowiecka to Konstantynow Lodzki | 130.52 mi (210.05 km) |
| Ostrow Mazowiecka to Koronowo | 168.52 mi (271.20 km) |
