I just wanted to share my experience--I flew Delta, and was told that if I brought my dress, it would count as my carry-on, so I couldn't bring another carry-on (other than a purse). I would definitely check with your carrier first, as you don't want to risk having to check something important! As for his suit, we put his in a checked suitcase, and bought a portable steamer for $30 from Bed, Bath, and Beyond--which worked wonderfully on my dress as well. My dress was hanged in the first class closet with no problem.