| Ostrow Mazowiecka to Lapua | 703.83 mi (1,132.71 km) |
| Ostrow Mazowiecka to Laukaa | 680.82 mi (1,095.67 km) |
| Ostrow Mazowiecka to Lauritsala | 619.02 mi (996.22 km) |
| Ostrow Mazowiecka to Lempaala | 592.48 mi (953.50 km) |
| Ostrow Mazowiecka to Leppavirta | 703.43 mi (1,132.05 km) |
| Ostrow Mazowiecka to Lieksa | 783.43 mi (1,260.81 km) |
| Ostrow Mazowiecka to Lieto | 532.42 mi (856.85 km) |
| Ostrow Mazowiecka to Liminka | 838.86 mi (1,350.02 km) |
| Ostrow Mazowiecka to Liperi | 726.01 mi (1,168.41 km) |
| Ostrow Mazowiecka to Lohja | 521.25 mi (838.88 km) |
| Ostrow Mazowiecka to Loimaa | 557.90 mi (897.85 km) |
| Ostrow Mazowiecka to Loviisa | 553.88 mi (891.38 km) |
| Ostrow Mazowiecka to Mantsala | 556.31 mi (895.30 km) |
| Ostrow Mazowiecka to Mariehamn | 509.88 mi (820.58 km) |
| Ostrow Mazowiecka to Masku | 536.96 mi (864.16 km) |
