| Miercurea-Ciuc to Opole | 466.76 mi (751.17 km) |
| Miercurea-Ciuc to Orzesze | 416.62 mi (670.49 km) |
| Miercurea-Ciuc to Osowa | 643.42 mi (1,035.48 km) |
| Miercurea-Ciuc to Ostroda | 569.03 mi (915.76 km) |
| Miercurea-Ciuc to Ostroleka | 500.34 mi (805.23 km) |
| Miercurea-Ciuc to Ostrow Mazowiecka | 477.92 mi (769.14 km) |
| Miercurea-Ciuc to Ostrow Wielkopolski | 513.82 mi (826.91 km) |
| Miercurea-Ciuc to Ostrowiec Swietokrzyski | 374.34 mi (602.45 km) |
| Miercurea-Ciuc to Ostrzeszow | 499.36 mi (803.64 km) |
| Miercurea-Ciuc to Oswiecim | 395.27 mi (636.12 km) |
| Miercurea-Ciuc to Otwock | 447.10 mi (719.54 km) |
| Miercurea-Ciuc to Ozarow Mazowiecki | 462.98 mi (745.09 km) |
| Miercurea-Ciuc to Ozimek | 457.26 mi (735.89 km) |
| Miercurea-Ciuc to Ozorkow | 486.24 mi (782.53 km) |
| Miercurea-Ciuc to Pabianice | 466.80 mi (751.25 km) |
