| Harmanli to Orzesze | 662.54 mi (1,066.26 km) |
| Harmanli to Osowa | 927.38 mi (1,492.48 km) |
| Harmanli to Ostroda | 857.60 mi (1,380.17 km) |
| Harmanli to Ostroleka | 795.02 mi (1,279.45 km) |
| Harmanli to Ostrow Mazowiecka | 773.48 mi (1,244.80 km) |
| Harmanli to Ostrow Wielkopolski | 771.51 mi (1,241.62 km) |
| Harmanli to Ostrowiec Swietokrzyski | 657.41 mi (1,057.99 km) |
| Harmanli to Ostrzeszow | 755.27 mi (1,215.49 km) |
| Harmanli to Oswiecim | 644.68 mi (1,037.50 km) |
| Harmanli to Otwock | 736.28 mi (1,184.93 km) |
| Harmanli to Ozarow Mazowiecki | 749.47 mi (1,206.16 km) |
| Harmanli to Ozimek | 705.73 mi (1,135.76 km) |
| Harmanli to Ozorkow | 759.48 mi (1,222.27 km) |
| Harmanli to Pabianice | 738.04 mi (1,187.75 km) |
| Harmanli to Parczew | 685.24 mi (1,102.78 km) |
