PHILADELPHIA (CBS) — American Airlines says it’s largely back to normal following an operational meltdown. On Tuesday, American canceled four out of 207 departures at Philadelphia International Airport.

On Monday, American canceled more than 450 flights nationwide.

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Over the weekend, the airline canceled nearly 2,000 flights.

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American says the trouble began with high winds at its Dallas-Fort Worth hub, which slowed operations and caused crews to be out of position.

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American also cited staffing shortages as a reason for its troubles.