FILE PHOTO: An American Airlines Boeing 737 Max 8, on a flight from Miami to New York City, comes in for landing at LaGuardia Airport in New York, U.S., March 12, 2019. REUTERS/Shannon Stapleton /File Photo

(Reuters) - American Airlines said on Sunday it will extend cancellations of 90 flights a day through June 5 because of the grounding of Boeing 737 MAX aircraft following two deadly crashes in five months.

The extended cancellation by the largest U.S. airline is the latest sign that the airplane is not expected to return to service anytime soon. American Airlines said on March 24 it had canceled 90 flights a day through April 24. On Friday, Boeing said it plans to cut its monthly 737 aircraft production by nearly 20 percent.