| Samokov to Olympia Heights (Florida) | 5,692.68 mi (9,161.48 km) |
| Samokov to Omaha (Nebraska) | 5,543.54 mi (8,921.46 km) |
| Samokov to On Top of the World Designated Place (Florida) | 5,617.15 mi (9,039.93 km) |
| Samokov to Onalaska (Wisconsin) | 5,243.60 mi (8,438.75 km) |
| Samokov to Oneida (New York) | 4,703.11 mi (7,568.92 km) |
| Samokov to Oneonta (New York) | 4,705.83 mi (7,573.29 km) |
| Samokov to Ontario (California) | 6,615.42 mi (10,646.50 km) |
| Samokov to Ontario (Oregon) | 5,989.61 mi (9,639.34 km) |
| Samokov to Opa-locka (Florida) | 5,680.54 mi (9,141.95 km) |
| Samokov to Opelika (Alabama) | 5,576.03 mi (8,973.75 km) |
| Samokov to Opelousas (Louisiana) | 5,954.64 mi (9,583.06 km) |
| Samokov to Orange (California) | 6,635.57 mi (10,678.92 km) |
| Samokov to Orange (Texas) | 6,041.83 mi (9,723.39 km) |
| Samokov to Orange City (Florida) | 5,581.80 mi (8,983.03 km) |
| Samokov to Orangeburg (South Carolina) | 5,347.94 mi (8,606.68 km) |
