| Cities | Distance |
|---|---|
| Sliven to Novi di Modena | 783.47 mi (1,260.87 km) |
| Sliven to Novi Ligure | 886.10 mi (1,426.04 km) |
| Sliven to Nuoro | 893.18 mi (1,437.43 km) |
| Sliven to Occhiobello | 750.59 mi (1,207.96 km) |
| Sliven to Oderzo | 716.76 mi (1,153.52 km) |
| Sliven to Oggiono | 865.78 mi (1,393.35 km) |
| Sliven to Olbia | 874.10 mi (1,406.72 km) |
| Sliven to Oleggio | 898.44 mi (1,445.91 km) |
| Sliven to Olgiate Comasco | 884.07 mi (1,422.78 km) |
| Sliven to Olgiate Olona | 886.72 mi (1,427.04 km) |
| Sliven to Omegna | 911.66 mi (1,467.17 km) |
| Sliven to Opera | 868.68 mi (1,398.00 km) |
| Sliven to Oppeano | 773.21 mi (1,244.36 km) |
| Sliven to Orbassano | 948.07 mi (1,525.77 km) |
| Sliven to Orbetello | 768.67 mi (1,237.05 km) |