United Airlines is ‘deeply disappointed’ in Boeing over delays to new plane deliveries, as another major customer warns it needs to get its ‘act together’

• United Airlines’ CFO said the airline is “deeply disappointed” in Boeing due to delays, per Reuters.

• It is reportedly looking to buy more Airbus jets due to delays for the 737 Max 10.

• Ryanair’s CEO also said Boeing’s management “doesn’t appear to have a grip on the situation.”

Airlines are getting frustrated with Boeing due to delivery delays.

United Airlines is “deeply disappointed” in Boeing, its chief financial officer, Mike Leskinen, said during a Tuesday conference, Reuters reported.

His comments come after CEO Scott Kirby warned Boeing that United could change its plans due to delays to the certification of the 737 Max 10, the longest version of the single-aisle jet.

“The Max 9 grounding is probably the straw that broke the camel’s back for us,” he told CNBC in January. “We’re gonna build an alternative plan that just doesn’t have the Max 10 in it.”

United — which is Boeing’s biggest customer — has 277 Max 10…