A woman accused of abducting her infant daughter from her father 20 years ago will be extradited to the United States.

Dorothy Lee Barnett's lawyers asked the Federal Government to prevent the extradition, but the ABC has confirmed Federal Justice Minister Michael Keenan has determined that Ms Barnett will be surrendered.

"The Minister arrived at his determination following careful consideration of the provisions of Australia’s extradition law and taking into account representations made by, and on behalf of, Ms Barnett," a government spokesperson said in a statement.

"In August 2014, the Minister for Justice determined that Ms Barnett is to be surrendered to the United States."

It is alleged that in 1994, Barnett abducted her then 10-month-old daughter, Savannah Todd, from the child's American father, who had been granted sole custody.

According to US authorities, Barnett left for a birthday party with her daughter in South Carolina and never returned.

In November 2013, Australian and US police found the pair living on Queensland's Sunshine Coast.

When arrested, she consented to extradition but then reneged.

Barnett, 53, will face prosecution for international parental kidnapping and passport-related offences.

She remains in custody, where she had regular visits from her daughter.

Subject to any application for review of the Minister’s surrender determination, US authorities have two months in which to escort Ms Barnett to the United States.