Its been like this a few years now. I remember when CO first went legal it was a huge deal at the airports. They had places to drop off extra weed at the entrances and TSA were definitely checking for it. I dunno when it changed but I personally found out sometime around 2019 and started flying with it since then and have had no problems, even up to half an ounce on me. And I've even flown to and from TN with it so its not just legal states.