I think it should say FAA approved right on the side of the seat, on the plastic part. Word of advice... if you plan on putting it rear facing like you do in your car, go to the FAA's site and print out where it says what their guidelines are for infants on airplanes. When my older dd was an infant we had our infant seat rear facing, and the flight attendants gave me SUCH a hard time about having her that way, saying the person in front couldn't recline (that person said they didn't care but the FAs persisted). I had printed from the FAA site what their suggestions are for infants, and told the FA I would be more than happy to wait while we called the FAA directly to ask them. They finally gave up. That was the only time I had a problem though.