The last United Airlines 747 is greeted by water cannons after it makes its final landing at Dulles International Airport October 19, 2017 in Dulles, VA.

United Airlines has extended cancellations of the Boeing 737 Max through early July, following similar moves by other major airlines coping with the jet's prolonged grounding.

American Airlines said Sunday it will cancel all Max flights through Aug. 19. On Friday, Southwest Airlines removed the Max jet from its schedule through Aug. 5. United had previously cancelled Max flights through June 5.

The widespread cancellations come after the Max's anti-stall software was implicated in two fatal crashes in Ethiopia and Indonesia since October.