United Airlines Boeing 737 Max 9 lands on March 13, 2019 at the San Francisco International Airport in Burlingame, California.
Justin Sullivan | Getty Images
United Airlines has announced on Friday not to fly the Boeing 737 Max before Dec. 19, more than a month later than expected, as the Jets' worldwide landing of the six-month mark and approaching flight cancellations are piling up during the holiday season ,
US federal regulators grounded the aircraft in mid-March after two deadly crashes ̵
United and its US competitors, who have Max in their fleets, Americans and Southwest, have canceled thousands of flights during the busy summer travel season as aircraft traction declines. They have also repeatedly extended dismissals from the Max. Regulators have yet to announce when aircraft may be returned to service, resulting in headaches in flight and crew planning.
The southwest of last month took the plane out of the flight schedule until early January, the last of the US airlines.
] United, which has 14 Boeing 737 Max 9 jets in its fleet, had previously expected the planes to return on November 3. The new change, which means United will not have the planes in time for the busy Thanksgiving holiday, means 93 flight cancellations per day in November and 96 per day in December, or an estimated 1,700 per month.
United's planned return date on December 19 will return the aircraft shortly before Christmas. However, this return depends on Boeing and the aviation authorities.
Boeing developed a software update for the aircraft after the investigators had implicated a flight control program that repeatedly pushed down the noses of the two crashed Max jets. It is expected that the fix will be delivered in September.