| Gorna Oryahovitsa to Oria | 453.23 mi (729.41 km) |
| Gorna Oryahovitsa to Oristano | 910.93 mi (1,466.00 km) |
| Gorna Oryahovitsa to Orta Nova | 525.61 mi (845.88 km) |
| Gorna Oryahovitsa to Orte | 675.88 mi (1,087.72 km) |
| Gorna Oryahovitsa to Ortona | 575.51 mi (926.19 km) |
| Gorna Oryahovitsa to Orvieto | 687.38 mi (1,106.23 km) |
| Gorna Oryahovitsa to Orzinuovi | 794.29 mi (1,278.29 km) |
| Gorna Oryahovitsa to Osimo | 614.15 mi (988.38 km) |
| Gorna Oryahovitsa to Ospitaletto | 788.71 mi (1,269.31 km) |
| Gorna Oryahovitsa to Ostuni | 448.70 mi (722.12 km) |
| Gorna Oryahovitsa to Ottaviano | 596.99 mi (960.76 km) |
| Gorna Oryahovitsa to Ovada | 853.97 mi (1,374.33 km) |
| Gorna Oryahovitsa to Ozieri | 875.50 mi (1,408.98 km) |
| Gorna Oryahovitsa to Paceco | 775.37 mi (1,247.84 km) |
| Gorna Oryahovitsa to Pachino | 714.58 mi (1,150.00 km) |
