Justice Department set to block JetBlue's $3.8 billion deal for Spirit Airlines

Federal antitrust enforcers are preparing to file a lawsuit seeking to block JetBlue Airways' proposed $3.8 billion acquisition of Spirit Airlines.

The deal, announced in July of 2022 after JetBlue topped a rival bid for Spirit from Frontier Airlines, would create the fifth-largest carrier in the U.S. 

Lawyers for the U.S. Department of Justice could move to halt the transaction as early as Tuesday, CBS News confirmed.