SEOUL, Sept 9 (Reuters) - South Korea will send a

chartered plane to Atlanta as early as Wednesday to bring back

workers detained during a huge immigration raid last week on a

car battery plant in the U.S. state of Georgia, a Korean Air

spokesperson said on Tuesday.

A Korean Air Boeing 747-8i plane with 368 seats will fly

from South Korea's Incheon to Atlanta, according to the

spokesperson.

During the U.S. immigration raid, about 300 South

Koreans were among 475 people

arrested

at the site of a $4.3 billion project by Hyundai Motor ( HYMLF )

and LG Energy Solution to build

batteries for electric cars.

South Korean Foreign Minister Cho Hyun is traveling to

Washington to negotiate on issues such as seeking assurances

that the detained Koreans will be allowed re-entry to the United

States.

South Korean officials had kicked off the process of

bringing the detained workers back home, a senior diplomatic

official told reporters in Georgia after meeting with the

workers in custody.

The raid was the largest single-site enforcement

operation in the history of the Department of Homeland

Security's investigative operations, and sent shockwaves through

South Korea, a U.S. ally that has been trying to finalise a

trade deal agreed with Washington in July.