The airline claims to be working with the law enforcement agencies to investigate them.
The flight attendants went through a routine customs clearance Monday during their arrest, according to a Miami-Dade police report.
A customs and border patrol agent checks Carlos Alberto Munoz-Moyano, who arrived on an incoming flight from Chile. The agent asked him how much money he was bringing and Munoz-Moyano said he had $ 100, according to a police report.
He later changed his statement and said he had $ 9,000, according to a police report.
The agent warned other agents who found other participants in the same battle carrying large sums of money, the report said; no one was licensed to carry the cash.
The police report edited what the flight attendants acknowledged when interviewed by an internal security agent.
Agents found $ 7,300 from stewardess Miaria Delpilar Roman-Strik and $ 6,371
The four defendants are charged with money laundering by avoiding reporting requirements and misappropriating money transmitters.
CNN failed to find attorneys for flight attendants.
It is unclear whether or how much money was reported by the other defendants for importation into the United States. The total amount of money seized is $ 22,671.
CNN's Rene Marsh and Giovanna Van Leuven contributed to this report.