After two days of mass cancellations, American Airlines canceled hundreds of additional flights Sunday, including more than 100 alone at Chicago's O'Hare International Airport.
The airline has canceled at least 1,500 flights since Friday, blaming the disruptions on staffing problems and earlier high winds at its busiest hub, Dallas/Fort Worth International Airport.
At least 613 flights were canceled Sunday, accounting for 12% of the airline's operations for the day.
As of 8:35 p.m., O'Hare Airport reported a total of 176 cancellations, with 126 of the affected flights operated by American. Of a total 278 delayed flights, both departures and arrivals, 50 were American Airlines flights.
Delays averaged less than 15 minutes Sunday evening, according to the Chicago Department of Aviation.
The airline's other major hubs, including Charlotte, Phoenix and Miami, also reported a large number of cancellations.
The problems have been plaguing American since Friday, when it canceled 342 flights and delayed an additional 737 flights. On Saturday, the airline canceled nearly 460 flights or 17% of its mainline schedule.
According to American, most of the customers impacted by the flight cancellations are being rebooked the same day.
The airline said that team members anticipate getting through this irregular operational period "quickly with the start of a new month."
American isn't the only airline to report recent mass cancellations as Southwest Airlines encountered issues of its own just weeks ago. Southwest canceled more than 2,000 flights over the weekend of Oct. 9-10.