United Airlines relies heavily on its Boeing 737 MAX fleet to serve ... The two primary variants of the 737 MAX, the MAX 8 and MAX 9, play a key role in delivering high seat capacity on routes ...

On the busiest days of the month, there are 10 roundtrips and more than 3,300 seats available. Although the MAX 8 is the most-used aircraft by United, the airline also deploys its Boeing 737 MAX ...