| Smolyan to Orangevale (California) | 6,490.63 mi (10,445.66 km) |
| Smolyan to Orchards (Washington) | 6,077.57 mi (9,780.91 km) |
| Smolyan to Orcutt (California) | 6,710.62 mi (10,799.69 km) |
| Smolyan to Oregon (Ohio) | 5,147.71 mi (8,284.44 km) |
| Smolyan to Oregon (Wisconsin) | 5,305.91 mi (8,539.04 km) |
| Smolyan to Oregon City (Oregon) | 6,100.72 mi (9,818.16 km) |
| Smolyan to Orem (Utah) | 6,154.51 mi (9,904.73 km) |
| Smolyan to Orinda (California) | 6,562.95 mi (10,562.04 km) |
| Smolyan to Orland Park (Illinois) | 5,315.38 mi (8,554.28 km) |
| Smolyan to Orlando (Florida) | 5,683.02 mi (9,145.94 km) |
| Smolyan to Ormond Beach (Florida) | 5,633.68 mi (9,066.53 km) |
| Smolyan to Oro Valley (Arizona) | 6,598.53 mi (10,619.31 km) |
| Smolyan to Oroville (California) | 6,447.36 mi (10,376.02 km) |
| Smolyan to Oshkosh (Wisconsin) | 5,222.91 mi (8,405.47 km) |
| Smolyan to Oskaloosa (Iowa) | 5,502.46 mi (8,855.36 km) |
