| Harmanli to Novi di Modena | 778.81 mi (1,253.38 km) |
| Harmanli to Novi Ligure | 880.03 mi (1,416.27 km) |
| Harmanli to Nuoro | 868.05 mi (1,397.00 km) |
| Harmanli to Occhiobello | 746.44 mi (1,201.27 km) |
| Harmanli to Oderzo | 717.80 mi (1,155.18 km) |
| Harmanli to Oggiono | 864.50 mi (1,391.28 km) |
| Harmanli to Olbia | 851.24 mi (1,369.93 km) |
| Harmanli to Oleggio | 895.99 mi (1,441.96 km) |
| Harmanli to Olgiate Comasco | 882.58 mi (1,420.38 km) |
| Harmanli to Olgiate Olona | 884.53 mi (1,423.52 km) |
| Harmanli to Omegna | 910.29 mi (1,464.98 km) |
| Harmanli to Opera | 865.54 mi (1,392.95 km) |
| Harmanli to Oppeano | 770.73 mi (1,240.37 km) |
| Harmanli to Orbassano | 942.74 mi (1,517.19 km) |
| Harmanli to Orbetello | 751.81 mi (1,209.92 km) |
