American Airlines canceled more than 1,200 flights this weekend, blaming bad weather and staffing shortages for the widespread disruption. The cancellations represented more than 12 percent of the airline’s scheduled flights for Saturday and Sunday, it said, and came just weeks after Southwest Airlines was forced to cancel nearly 2,000 flights.Severe wind late last week hampered operations at Dallas-Fort Worth International Airport, American’s largest hub airport, cutting into runway capacity and forcing a round of cancellations, David Seymour, the airline’s chief operating officer, said in a note to staff on Saturday. That disruption, combined with bad weather elsewhere in its network, stranded American flight crews in the wrong places, hindering the airline as it went into a typically …
