 In October 2012 ( 2012 @-@ 10 ) , Alaska placed the largest order in its history when it ordered a total of 50 Boeing 737s in a deal worth US $ 5 billion at list prices . The order consists of 20 Boeing 737 MAX 8s , 17 Boeing 737 MAX 9s and 13 Boeing 737 @-@ 900ERs . 
