"We are keeping our eye on things. We've seen good improvements," Acting FAA Administrator Billy Nolen told Reuters on Wednesday. "We can see overall delays are down… The airlines are working to right size their network."
In fact, the 10 major carriers in the U.S. saw improvements of both on-time performance and the rate of cancellations in May, according to U.S. Department of Transportation data. During the month, airlines canceled 2% of all scheduled domestic flights, a decrease from April when 2.3% were canceled. Airlines also reported an on-time arrival rate of 77.2% in May, an increase from the 76% reported in April.