FILE PHOTO: Employees walk by the end of a 737 Max aircraft at the Boeing factory in Renton, Washington, U.S., March 27, 2019. REUTERS/Lindsey Wasson/File Photo

CHICAGO (Reuters) – American Airlines Group Inc said on Sunday it is extending Boeing Co 737 MAX cancellations through Aug. 19, leading to about 115 daily canceled flights, or 1.5 percent of its daily summer flying schedule.

In a letter to employees and customers, Chief Executive Doug Parker and President Robert Isom said they believe the 737 MAX will be recertified before Aug. 19, but they want to ensure reliability “for the peak travel season and provide confidence to our customers and team members when it comes to their travel plans.”

Boeing’s 737 MAX aircraft was grounded worldwide in March