Transcript for American Airlines cancels nearly 400 flights
We turn to that travel mess for thousands of airline passengers. American airline has canceled hundreds of flights. Gio Benitez has more on why it's happening. Reporter: Weather is a big problem right now. We also learned American aligns is having major staffing issues. Over the weekend we saw a stunning number of cancellations. 123 flights on Saturday. 180 yesterday and already today about 100 fights canceled. Some of those cancellations happened right before that scheduled flight. Why is this happening? The airline tells us they have a high number of employees calling out sick. Plus, other staffing issues along with ability maintenance. Many airlines having trouble keeping up with the fast increase in travellers. More than 2 million screened by TSA Monday. American expects to cancel between 50 to 80 flights per day over the next month. So many people traveling. In the face of a last minute cancellation, what do you do? Reporter: American airlines said they'll cancel flights a little bitter earlier. If it happens to you, open up that airline app. That's going to be the fastest way to get the rebooking done. You have to do it as quickly as possible. George? Thank you.
This transcript has been automatically generated and may not be 100% accurate.