| Reggio Emilia to Orzesze | 533.98 mi (859.35 km) |
| Reggio Emilia to Osowa | 757.25 mi (1,218.67 km) |
| Reggio Emilia to Ostroda | 749.79 mi (1,206.66 km) |
| Reggio Emilia to Ostroleka | 760.50 mi (1,223.91 km) |
| Reggio Emilia to Ostrow Mazowiecka | 757.65 mi (1,219.31 km) |
| Reggio Emilia to Ostrow Wielkopolski | 582.56 mi (937.53 km) |
| Reggio Emilia to Ostrowiec Swietokrzyski | 658.39 mi (1,059.57 km) |
| Reggio Emilia to Ostrzeszow | 572.99 mi (922.14 km) |
| Reggio Emilia to Oswiecim | 544.84 mi (876.83 km) |
| Reggio Emilia to Otwock | 706.03 mi (1,136.24 km) |
| Reggio Emilia to Ozarow Mazowiecki | 696.36 mi (1,120.68 km) |
| Reggio Emilia to Ozimek | 542.22 mi (872.61 km) |
| Reggio Emilia to Ozorkow | 639.35 mi (1,028.93 km) |
| Reggio Emilia to Pabianice | 626.10 mi (1,007.62 km) |
| Reggio Emilia to Parczew | 738.10 mi (1,187.85 km) |
