DUBLIN, Sept 14 (Reuters) - Ryanair Group CEO

Michael O'Leary said on Saturday a prolonged Boeing ( BA ) workers'

strike may cut the number of aircraft it receives by next summer

to 20 from an anticipated 25.

O'Leary said his low-cost Irish airline, one of Boeing's ( BA )

largest customers, was supposed to receive 30 737 MAX

aircraft before summer 2025 but Boeing's ( BA ) operational issues had

already brought that number down to 25.

But now, with this week's Boeing's ( BA ) workers' strike further

threatening the airplane maker's turnaround, O'Leary said

Ryanair might only receive 20 planes if the strike continues for

three to four weeks.

"I have no doubt that Boeing ( BA ) will fix this strike," O'Leary

told Ireland's Newstalk Radio. "It may take a number of weeks."

Workers have been protesting all week in Boeing ( BA ) factories in

the Seattle area that assemble Boeing's ( BA ) MAX, 777 and 767 jets.

Boeing ( BA ) has pledged to grow output by the end of the year,

after wrestling with supply chain snags and operating a slower

assembly line since a Jan. 5 in-flight blowout of a door plug on

a 737 MAX 9 jet that heightened regulatory scrutiny.

O'Leary said it would likely take Boeing ( BA ) two to three years

to get back on track.

Boeing ( BA ) and union negotiators will return to the bargaining

table early next week as the two sides try to end a strike.

(Reporting by Conor Humphries;

Writing by Catarina Demony;

Editing by Ros Russell)