They're allowable by TSA. I just wanted to add that if you travel out of the country, other countries' TSA equivalents may not allow knitting needles. I made a bad assumption on a trip to Mexico and figured that if I could bring them on the Delta flight down, I would be able to bring them carry on for the trip back. They confiscated my knitting needles and a really nice pair of small scissors. (It was too late to get them in my checked bags and shipping them from the airport was not an option. I was sad.)