You can carry cooler aboard or checked. (I usually put my Polar Bear -24 can, cooler in a duffle, along with some clothing, and check it as others in my party have checked bags). I also place air tag in each bag so I know it reaches the destination (I have had episode where agent said all bags were off, yet AirTag proved it was just on the other side of wall...). Sausa can go in carry on if frozen. Check TSA site for details.