Something to consider so you can hedge your bets when planning flights/connections:
MagnifyMoney crunched numbers related to on-time arrival data from the U.S. Department of Transportation from 2008 to 2017. Of the 50 busiest airports in the United States, 52 percent had more summer delays than winter delays. Last summer saw some of the highest increases, with about half of the airports having more delays than in the summer of 2016.
Looking at the top 50 airports, Newark Liberty International (New Jersey) was worst for summer delays with an on-time arrival rate of just 67 percent, according to the report. The others in the bottom 10, with an on-time arrival rate ranging from 68 to about 75 percent, are LaGuardia (New York), San Francisco International, John F. Kennedy International (New York), Logan International (Boston), O'Hare International (Chicago), Miami International, Ronald Reagan Washington National, Raleigh-Durham (North Carolina) and Philadelphia International.
The airports with the best on-time arrivals, ranging from 80 to 88 percent, were Honolulu International (Hawaii), Salt Lake City International (Utah), John Wayne Airport (Orange County, Calif.), Phoenix Sky Harbor International, Seattle-Tacoma International, Portland International (Oregon), Minneapolis-St. Paul International, San Jose International (California) and McCarran International (Las Vegas).