American Airlines Group Inc. scrubbed more than 1,900 flights over the weekend, the latest in a series of cancellations to disrupt travelers’ plans, as the industry struggles to steady itself a year and a half into the pandemic.

Wind gusts late last week triggered American’s problems, slowing arrival rates at the airline’s busy Dallas-Fort Worth hub, Chief Operating Officer David Seymour told employees in a memo Saturday. The cancellations snowballed, as pilots and flight attendants weren’t in the right places for flights.