Beyond all these air travel hassles, there’s also always the potential for a lost, delayed, or damaged bag—and anyone who’s had it happen knows how fast it can ruin your whole experience. But not all airlines have the same record when it comes to handling bags. Read on to see the data that reveals the biggest offender. READ THIS NEXT: Delta Just Made This Permanent Change for All Passengers, Starting Now. According to the Bureau of Transportation Statistics, mishandled bags are “the number of check bags that are lost, damaged, delayed, and pilfered, as reported by or on behalf of the passenger, that were in the airline’s custody for its reportable domestic nonstop scheduled passenger flights.” Luggage mishandling is a common occurrence.  More than 684,000 bags were mishandled in just the first three months of 2022 alone, according to data from the Air Travel Consumer Reports published by the Department of Transportation and cited by The Points Guy. For perspective, that means about seven out of every 1,000 bags end up lost or delayed. Out of the top four major domestic carriers—American Airlines, Delta Air Lines, United Airlines, and Southwest Airlines—Southwest is the least likely to lose or damage your bag, the data shows. In the last year, it mishandled just four bags per 1,000.ae0fcc31ae342fd3a1346ebb1f342fcb And that’s really saying something, considering Southwest is known for its liberal bag policy—each passenger can check up to two bags without an additional cost—so the airline handles a lot of bags.  In the last year, the airline handled nearly 110 million, and 16 million just in the first two months of this year. But even with so much volume (or perhaps because of its well-practiced operations), its record comes out on top. READ THIS NEXT: For more travel news delivered straight to your inbox, sign up for our daily newsletter. In the middle of the list are Delta Air Lines (and its branded codeshare partners) as well as United Airlines (and its branded codeshare partners). Each of these airlines handles substantially fewer bags than Southwest (88,253,859 and 64,030,980 respectively in the last 12 months). But they also mishandled a larger number of them, with both major players losing or damaging more than five bags per 1,000 (5.2 and 5.3 respectively). The same data reveals the airline that holds the dubious distinction as the one most likely to mishandle your bags is American Airlines—and it’s not even a close contest. American Airlines handles nearly as many bags as Southwest’s high-volume operation, at 104,377,330 in the last 12 months. Of those, it lost, delayed, or damaged 835,200, for a total of eight in 1,000. That means its record is only half as good as Southwest’s—or, put more directly, twice as bad. As a passenger, you do have rights when something happens to your bag. Airlines are responsible for repairing or reimbursing a passenger for damaged baggage and/or its contents when the damage occurs while the bag is under the airline’s control during transportation, according to the U.S. Department of Transportation (DOT). If any damage to the bag cannot be repaired, airlines will negotiate a compensation amount based on the value of the bag (factoring in depreciation). Further, airlines are required to compensate passengers for “reasonable, verifiable, and actual incidental expenses that they may incur while their bags are delayed,” according to DOT. READ THIS NEXT: Never Forget to Do This After Boarding, Flight Attendant Warns.