| Sliven to Oakley (California) | 6,512.15 mi (10,480.30 km) |
| Sliven to Oakton (Virginia) | 5,050.58 mi (8,128.12 km) |
| Sliven to Oakville (Missouri) | 5,569.08 mi (8,962.57 km) |
| Sliven to Oatfield (Oregon) | 6,056.77 mi (9,747.42 km) |
| Sliven to Ocala (Florida) | 5,714.18 mi (9,196.08 km) |
| Sliven to Ocean Acres (New Jersey) | 4,889.86 mi (7,869.47 km) |
| Sliven to Ocean City (New Jersey) | 4,924.14 mi (7,924.63 km) |
| Sliven to Ocean Pines (Maryland) | 4,986.17 mi (8,024.47 km) |
| Sliven to Ocean Pointe (Hawaii) | 8,006.24 mi (12,884.80 km) |
| Sliven to Ocean Springs (Mississippi) | 5,925.13 mi (9,535.57 km) |
| Sliven to Oceanside (California) | 6,709.61 mi (10,798.08 km) |
| Sliven to Oceanside (New York) | 4,824.39 mi (7,764.11 km) |
| Sliven to Ocoee (Florida) | 5,717.22 mi (9,200.97 km) |
| Sliven to Oconomowoc (Wisconsin) | 5,267.75 mi (8,477.62 km) |
| Sliven to Odenton (Maryland) | 5,018.01 mi (8,075.71 km) |
