| Sliven to Ukiah (California) | 6,469.75 mi (10,412.06 km) |
| Sliven to Union (Missouri) | 5,593.65 mi (9,002.12 km) |
| Sliven to Union City (California) | 6,543.81 mi (10,531.25 km) |
| Sliven to Union City (Georgia) | 5,595.46 mi (9,005.02 km) |
| Sliven to Union City (New Jersey) | 4,834.44 mi (7,780.27 km) |
| Sliven to Union City (Tennessee) | 5,626.21 mi (9,054.51 km) |
| Sliven to Union Hill-Novelty Hill (Washington) | 5,901.84 mi (9,498.09 km) |
| Sliven to Union Park (Florida) | 5,705.14 mi (9,181.54 km) |
| Sliven to Uniondale (New York) | 4,818.98 mi (7,755.39 km) |
| Sliven to Universal City (Texas) | 6,333.71 mi (10,193.13 km) |
| Sliven to University (Florida) | 5,780.40 mi (9,302.65 km) |
| Sliven to University City (Missouri) | 5,558.27 mi (8,945.17 km) |
| Sliven to University Heights (Ohio) | 5,093.98 mi (8,197.96 km) |
| Sliven to University of California-Santa Barbara (California) | 6,697.47 mi (10,778.54 km) |
| Sliven to University Park (Texas) | 6,098.60 mi (9,814.74 km) |
