| Gorna Oryahovitsa to Novi di Modena | 744.27 mi (1,197.79 km) |
| Gorna Oryahovitsa to Novi Ligure | 847.33 mi (1,363.64 km) |
| Gorna Oryahovitsa to Nuoro | 864.61 mi (1,391.46 km) |
| Gorna Oryahovitsa to Occhiobello | 711.25 mi (1,144.64 km) |
| Gorna Oryahovitsa to Oderzo | 675.64 mi (1,087.34 km) |
| Gorna Oryahovitsa to Oggiono | 825.26 mi (1,328.13 km) |
| Gorna Oryahovitsa to Olbia | 844.07 mi (1,358.40 km) |
| Gorna Oryahovitsa to Oleggio | 858.29 mi (1,381.29 km) |
| Gorna Oryahovitsa to Olgiate Comasco | 843.60 mi (1,357.64 km) |
| Gorna Oryahovitsa to Olgiate Olona | 846.49 mi (1,362.29 km) |
| Gorna Oryahovitsa to Omegna | 871.12 mi (1,401.92 km) |
| Gorna Oryahovitsa to Opera | 828.80 mi (1,333.83 km) |
| Gorna Oryahovitsa to Oppeano | 733.21 mi (1,179.98 km) |
| Gorna Oryahovitsa to Orbassano | 908.95 mi (1,462.81 km) |
| Gorna Oryahovitsa to Orbetello | 735.26 mi (1,183.29 km) |
