UPDATED INFORMATION
The Centers for Disease Control and Prevention (CDC) announced new international travel guidelines that start on December 6, 2021. All air passengers, two (2) years of age and older, flying to the United States will need to provide proof of a negative COVID-19 test. This includes U.S. citizens traveling back into the United States and all other air passengers connecting through the United States.
The CDC mandates the test must be taken no more than one (1) day before the first flight into the U.S. from the passenger's initial departure city or traveler must present documentation of recovery from Covid-19 in the past 90 days. The test result must be presented before boarding, as paper or electronic copy, and a must be completed as required by the CDC. The form must be completed by each individual within your party, ages two or older. A parent or other authorized individual may attest on behalf of a passenger aged two to seventeen years.
More information can be found on the CDC website.