Airlines have been struggling to properly track and deliver your bags, with hundreds arriving days late -- or not at all.

In the U.S., airlines lost, damaged or delayed nearly 220,000 bags in just the month of June, according to a report from the Department of Transportation.

That's a 135% increase from June of last year.

Of the three main carriers, American Airlines performed the worst. They mishandled about 65,000 bags. Delta mishandled about 45,000, and just under 30,000 for United.