LAS VEGAS-American Airlines is having a difficult summer. On top of seasonal storms, the airline has struggled with the months-long grounding of Boeing 737 Max planes and a protracted labor dispute with its mechanics that the carrier says has forced it to cancel hundreds of flights and caused long delays.

Operations have been improving but the Fort Worth-based airline is calling customers hit with travel disruptions to apologize, an executive said Tuesday.

"Certainly we've disappointed people," Kerry Philipovitch, American's senior vice president of customer experience, told reporters at an industry conference in Las Vegas.

The company's stock has lagged its peers this year and on Wednesday closed at $24.45, the lowest since it combined with US Airways in December 2013.

American's customer service team is reaching out to travelers who have faced multiple disruptions, even if they're "minor inconveniences that they wouldn't necessarily call us about." The airline has given out compensation, generally American's Aadvantage frequent flyer miles.

"We try to find them we try to call and do what we can to retain their loyalty," she said.