Originally Posted by
bbtrvl
Lots of stories of people carrying on watermelons, so I would think it's ok. If the TSO insists, you might have to trash it, but usually they do not consider that sort of thing a liquid.
To avoid hassle, you probably want to take them out and tray them, or at least carry them in an entire separate bag.
If you are going to an agriculturally sensitive state like HI, FL or CA they may be confiscated for non airplane related reasons, so don't take them to those states.
There's no such restriction on going to agriculturally sensitive states. As long as your originate in the US, there's no restriction on taking food from one state to another. There is an exception for taking of items from Hawaii to the US/US Territories. However even this is ok as long as the items are approved by the USDA.