| Mersch to Orzesze | 562.40 mi (905.10 km) |
| Mersch to Osowa | 615.37 mi (990.34 km) |
| Mersch to Ostroda | 651.79 mi (1,048.96 km) |
| Mersch to Ostroleka | 703.20 mi (1,131.69 km) |
| Mersch to Ostrow Mazowiecka | 713.01 mi (1,147.48 km) |
| Mersch to Ostrow Wielkopolski | 528.63 mi (850.74 km) |
| Mersch to Ostrowiec Swietokrzyski | 678.36 mi (1,091.71 km) |
| Mersch to Ostrzeszow | 531.12 mi (854.76 km) |
| Mersch to Oswiecim | 583.62 mi (939.25 km) |
| Mersch to Otwock | 678.98 mi (1,092.72 km) |
| Mersch to Ozarow Mazowiecki | 660.45 mi (1,062.88 km) |
| Mersch to Ozimek | 538.77 mi (867.06 km) |
| Mersch to Ozorkow | 594.10 mi (956.11 km) |
| Mersch to Pabianice | 595.04 mi (957.63 km) |
| Mersch to Parczew | 743.60 mi (1,196.71 km) |
