| Mainz to Orzesze | 464.70 mi (747.87 km) |
| Mainz to Osowa | 529.24 mi (851.72 km) |
| Mainz to Ostroda | 560.67 mi (902.31 km) |
| Mainz to Ostroleka | 609.03 mi (980.14 km) |
| Mainz to Ostrow Mazowiecka | 618.04 mi (994.64 km) |
| Mainz to Ostrow Wielkopolski | 432.12 mi (695.44 km) |
| Mainz to Ostrowiec Swietokrzyski | 580.63 mi (934.44 km) |
| Mainz to Ostrzeszow | 434.12 mi (698.65 km) |
| Mainz to Oswiecim | 485.99 mi (782.13 km) |
| Mainz to Otwock | 582.69 mi (937.75 km) |
| Mainz to Ozarow Mazowiecki | 564.45 mi (908.39 km) |
| Mainz to Ozimek | 440.96 mi (709.66 km) |
| Mainz to Ozorkow | 497.93 mi (801.34 km) |
| Mainz to Pabianice | 498.22 mi (801.80 km) |
| Mainz to Parczew | 646.43 mi (1,040.32 km) |
