Guns are not illegal in airports
At least in Missouri, or so a court has ruled:
A recent Missouri Court of Appeals decision has clarified the law, saying it is not a criminal offense to carry a firearm into the airport or through airport security if you are a concealed carry permit holder.
“It clearly says now from the court of appeals if you carry a firearm into Lambert, you can be asked to leave, possibly subject to a fine, but you can’t be arrested and charged for unlawful use of a weapon if you are a conceal carry permit holder,” said Matt Fry, Partner at Rosenblum and Fry.