American Airlines, based in Dallas/Fort Worth, Texas said that it has canceled more than 1,200 flights through Saturday and Sunday. The airlines said that weather disruptions lead to staff shortages. It said that operations should improve next month. Passengers took to Twitter to complain about the cancellations as well as the delays on Halloween weekend.

The number of flights canceled according to FlightAware are as follows

Friday–340
Saturday–543
Sunday–667

American Airlines also reported that flights were delayed. Most of the cancellations and delays were seen at its hub in Dallas-Forth Worth International Airport. Other airports including those at Phoenix, Charlotte and Miami also reported cancellations.

CNBC reported that American’s COO David Seymour sent a note to staff on Saturday which said that the problems had started with high wind gusts on Thursday. This led to a decrease in capacity at the Dallas/Forth Worth International Airport hub. It also resulted in crew members being out of position for their next flights.

CNBC saw internal tallies where the reasons listed for most of the flight cancellations on both Saturday and Sunday were pilot and flight attendant availability.

In contrast, Southwestern Airlines which is a Dallas-based airline canceled 185 flights on Sunday, according to FlightAware. This is approximately five percent of its operations.

Captain Dennis Tajer, a spokesperson for the Allied Pilots Association, told the Daily Mail that although there was a weather event, the management had also failed to connect pilots and flight attendants to planes. He said that mother nature generated a storm but the management’s inability to properly schedule created “storms days after.”

When asked by the Mail if pilots and other employees at American Airlines were unhappy about vaccine mandates and whether this was a factor that created staff shortages, the spokesperson did not respond to this query.