You need to enroll in the STEP program (see link below).
The U.S. Embassy is actively assisting U.S. citizens, in compliance with Argentine travel restrictions, who wish to return to the United States. U.S. citizens who are considering returning to the United States should work with their airlines to make travel arrangements while flights are still available. In case commercial transportation options cease to be available, we are compiling a list of persons seeking to leave Argentina. In preparation for possible flights, U.S. citizens interested in returning to the United States must do the following:
· Complete the table below and e-mail it to BuenosAiresUSCitizen@state.gov indicating your desire to return to the United States. In the subject line of your e-mail, please write “Charter Flight Registration: LAST NAME, FIRST NAME, DATE OF BIRTH DD-MMM-YYYY." If you are in a group with multiple U.S. citizen travelers, please send a separate e-mail for each traveler. Each field below must be completed or your submission cannot be accepted.
· Enroll in the Smart Traveler Enrollment Program (STEP), the State Department’s system for registering and communicating with U.S. citizens abroad. This will ensure you receive all Embassy travel updates, including any regarding return flights to the United States.
· Continue to follow up with airlines about the availability of commercial flights, which could re-start operations before other travel arrangements such as charter flights are available.