 In October 2012 ( 2012 @-@ 10 ) , a new order was placed by the carrier in a deal worth more than US $ 5 billion , this time for a total 50 Boeing 737s . The largest single order in the airline 's history , it consists of 20 Boeing 737 MAX 8s , 17 Boeing 737 MAX 9s and 13 Boeing 737 @-@ 900ERs . 
