Transcript for Air travel expectations for Memorial Day weekend
millions are hitting the skies and that weather is already leading to so many delays and cancellations and ABC's David Kerley at Reagan national airport where we saw the growing lines. Good morning. Reporter: Good morning, David. You can see it is a heavy flow today and a lot of folks in line and weather is complicating this and it is going to be a record. According to the estimates we're talking 4% to 5% more people flying in holiday weekend. If there were 100 on your plane, 104, 105 this year and for the summer season just kicking off it's only going to get busier. Aaa is estimating that 234 million Americans are going to be hitting the skies over the summer season. It's a lot of folks flying, David, and the weather that we're talking about in the last couple of days has been this complicating factor. More than 900 flights canceled yesterday, more than 7,000 delayed and, of course, they're trying to deal with that today to get all these folks where they want to go. A big dose of patience needed. What about new TSA procedures for screening carry-ons testing them in certain airports. Where is it happening? Reporter: We're not seeing it here at Reagan. Ten airports around the country testing new procedures where you have to take out any electronic device bigger than your food, some food products and even big books. The problem is we are packing too much into our bags so TSA is testing this new plan. L.A.X., Phoenix, Boston, some of the big airports where those tests are going on, David. All right, thanks. I'm one of those people, the ziploc bag is broken. Get a new ziploc. What you should pack is a lot of patience. The roads are going to be packed
This transcript has been automatically generated and may not be 100% accurate.