| Ermont to Orzesze | 741.64 mi (1,193.55 km) |
| Ermont to Osowa | 786.52 mi (1,265.78 km) |
| Ermont to Ostroda | 827.66 mi (1,331.99 km) |
| Ermont to Ostroleka | 881.70 mi (1,418.96 km) |
| Ermont to Ostrow Mazowiecka | 892.15 mi (1,435.78 km) |
| Ermont to Ostrow Wielkopolski | 708.87 mi (1,140.81 km) |
| Ermont to Ostrowiec Swietokrzyski | 858.69 mi (1,381.93 km) |
| Ermont to Ostrzeszow | 711.56 mi (1,145.14 km) |
| Ermont to Oswiecim | 762.62 mi (1,227.31 km) |
| Ermont to Otwock | 859.06 mi (1,382.52 km) |
| Ermont to Ozarow Mazowiecki | 840.35 mi (1,352.42 km) |
| Ermont to Ozimek | 718.93 mi (1,157.00 km) |
| Ermont to Ozorkow | 774.15 mi (1,245.87 km) |
| Ermont to Pabianice | 775.41 mi (1,247.90 km) |
| Ermont to Parczew | 924.06 mi (1,487.13 km) |
