A report from milecards.com  has found that Newark International Airport has the worst on-time performance of any airline during the busy summer travel months, with an average of just 66.5 per cent of Newark flights operating on schedule. New York’s LaGuardia International Airport had the second-worst on-time performance, while nearby Kennedy International Airport was fourth on the list. San Francisco International Airport has the third-fewest on-time arrivals among U.S. airports.

The report was drawn from U.S. Department of Transportation data on summer travel for the period 2007-2016.

Interestingly, the study show that most U.S. airports have worse delays in the summer than the winter, even in areas subject to severe winter weather, like Boston and New York. June is the worst month for summer air-travel delays (Boston finished fifth on the list of oft-delayed airports).

Kahului International Airport and Honolulu International Airport, on the Hawaiian islands of Maui and Oahu, respectively, had the best on-time performance for summer travel, with 88 per cent and 86.5 per cent of flights arriving on time, respectively. Summer is considered low season for Hawaii travel.

Other airports with good on-time performance for summer travel include Salt Lake City International Airport, Orange County International Airport, and Phoenix/Sky Harbor International Airport.