Flights saw major cancelations and delays this weekend as many were traveling for the Juneteenth holiday and Father's Day amid airline staffing shortages.

There were more than 1,000 flights delayed and more than 700 flights canceled on Sunday, according to FlightAware. Hartsfield-Jackson Atlanta International Airport, John F. Kennedy International Airport in New York City, and Chicago O'Hare International Airport were affected the most.

The weekend had around 2.4 million travelers. Friday had 1,100 flight cancelations and also accounted for the busiest air travel day of the year. Thursday saw 1,700 cancelations, according to TSA.

Flight Aware reported that there were 6,300 flights delayed on Saturday with 859 flights canceled.

Flight cancelations have been common due to pilot and staffing shortages. Air travel has been on the rise due to the summer and the ease of COVID-19 restrictions.

Transportation Secretary Pete Buttigieg met with airline CEOs late Thursday to address the number of cancelations and delays.

“That is happening to a lot of people, and that is exactly why we are paying close attention here to what can be done and how to make sure that the airlines are delivering,” Buttigieg told the Associated Press on Saturday.