| Smolyan to Novi di Modena | 730.17 mi (1,175.10 km) |
| Smolyan to Novi Ligure | 829.89 mi (1,335.57 km) |
| Smolyan to Nuoro | 805.59 mi (1,296.47 km) |
| Smolyan to Occhiobello | 698.35 mi (1,123.89 km) |
| Smolyan to Oderzo | 674.44 mi (1,085.40 km) |
| Smolyan to Oggiono | 818.41 mi (1,317.11 km) |
| Smolyan to Olbia | 789.91 mi (1,271.24 km) |
| Smolyan to Oleggio | 848.80 mi (1,366.01 km) |
| Smolyan to Olgiate Comasco | 836.26 mi (1,345.82 km) |
| Smolyan to Olgiate Olona | 837.60 mi (1,347.98 km) |
| Smolyan to Omegna | 863.99 mi (1,390.45 km) |
| Smolyan to Opera | 817.85 mi (1,316.21 km) |
| Smolyan to Oppeano | 723.98 mi (1,165.13 km) |
| Smolyan to Orbassano | 893.01 mi (1,437.16 km) |
| Smolyan to Orbetello | 694.19 mi (1,117.20 km) |
