American Airlines will extend cancellations on 90 flights a day through June 5, following the grounding of Boeing 737 MAX aircraft after two deadly crashes in five months, it said on Sunday.
The move by the biggest U.S. airline is the latest sign showing that the Boeing model is not expected to resume service any time soon.
On March 24, the airlines said it would cut 90 flights a day until April 24.
On Friday, Boeing also announced it plans to reduce its monthly 737 aircraft production by about 20 percent.
There have been two Boeing 737 MAX 8 aircraft crashes in less then five months- one crash of a Lion Air jet in October, 2018, that killed 189, and the Ethiopian Airlines crash that occurred on March 10 that killed 157 people aboard.