According to the company, the failures are related to bad weather and air traffic control problems.

Southwest Airlines canceled more than a thousand flights on Sunday, 27 percent of its schedule, explaining this with problems with the dispatch service and bad weather.

NBC News reported this.

Alan Kasher, who oversees the day-to-day operations of flights, said in a written appeal to employees that the airline faced “significant consequences at Florida airports… after the introduction of the Federal Civil Aviation Administration’s air traffic control program due to bad weather, which led to a large number of flight cancellations.”

The Federal Aviation Administration, which controls air traffic, has not yet made comments. The airline apologized to passengers for the long wait for support service responses.

On Saturday, she expressed hope that she would be able to get closer to normal work on Sunday.

According to the FlightAware website, 808 Southwest Airlines flights were canceled on Saturday. At the same time, American Airlines, which has a major hub in Miami, canceled 63 mainline flights (2 percent of the total), and Spirit Airlines, based in Fort Lauderdale, Florida, canceled 32 flights (4 percent).

Staff shortages have led to the cancellation of hundreds of Southwest Airlines flights this summer.

The company did not answer the question of whether the cancellation of flights this weekend is due to a shortage of staff.