| Ostrow Mazowiecka to Kobarid | 586.03 mi (943.13 km) |
| Ostrow Mazowiecka to Kobilje | 488.54 mi (786.23 km) |
| Ostrow Mazowiecka to Kocevje | 587.15 mi (944.93 km) |
| Ostrow Mazowiecka to Komen | 605.52 mi (974.49 km) |
| Ostrow Mazowiecka to Komenda | 562.03 mi (904.49 km) |
| Ostrow Mazowiecka to Koper | 621.26 mi (999.82 km) |
| Ostrow Mazowiecka to Kostanjevica na Krki | 561.50 mi (903.65 km) |
| Ostrow Mazowiecka to Kostel | 593.98 mi (955.92 km) |
| Ostrow Mazowiecka to Kozje | 544.62 mi (876.48 km) |
| Ostrow Mazowiecka to Kranj | 565.08 mi (909.41 km) |
| Ostrow Mazowiecka to Kranjska Gora | 566.83 mi (912.22 km) |
| Ostrow Mazowiecka to Krizevci | 501.64 mi (807.31 km) |
| Ostrow Mazowiecka to Krsko | 553.87 mi (891.38 km) |
| Ostrow Mazowiecka to Kuzma | 486.67 mi (783.23 km) |
| Ostrow Mazowiecka to Lasko | 547.33 mi (880.85 km) |
