| Ostrow Mazowiecka to Krosno Odrzanskie | 291.30 mi (468.80 km) |
| Ostrow Mazowiecka to Krotoszyn | 204.08 mi (328.43 km) |
| Ostrow Mazowiecka to Kruszwica | 149.60 mi (240.76 km) |
| Ostrow Mazowiecka to Krynica | 237.67 mi (382.49 km) |
| Ostrow Mazowiecka to Krzeszowice | 208.46 mi (335.49 km) |
| Ostrow Mazowiecka to Kudowa-Zdroj | 292.43 mi (470.63 km) |
| Ostrow Mazowiecka to Kutno | 113.47 mi (182.62 km) |
| Ostrow Mazowiecka to Kwidzyn | 138.67 mi (223.17 km) |
| Ostrow Mazowiecka to Lancut | 189.40 mi (304.81 km) |
| Ostrow Mazowiecka to Lapy | 42.90 mi (69.04 km) |
| Ostrow Mazowiecka to Lask | 143.92 mi (231.61 km) |
| Ostrow Mazowiecka to Laziska Gorne | 225.24 mi (362.49 km) |
| Ostrow Mazowiecka to Lebork | 208.44 mi (335.45 km) |
| Ostrow Mazowiecka to Leczna | 111.74 mi (179.83 km) |
| Ostrow Mazowiecka to Leczyca | 125.00 mi (201.16 km) |
