US airlines maintain robust networks with Boeing's controversial but efficient jet

Despite these challenges, American Airlines continues to operate its fleet of Boeing 737 MAX aircraft extensively. As of May, it scheduled over 1,500 weekly flights using this model on domestic and international routes.

Alaska Airlines operates an all-737 fleet including five MAX 8s and seventy-seven MAX 9s. They schedule over fifteen hundred weekly departures within the US and have a smaller international network.

Allegiant Air began operating its first Boeing 737 MAX in September last year after delays. Their network is entirely domestic with nearly three hundred weekly departures.

Southwest Airlines remains the largest operator of the type worldwide with two hundred sixty-two units in service. Over half of all US-based operators' scheduled flights this month will be flown by Southwest.

United Airlines ranks as the second-largest global operator with one hundred eighteen MAX 8s and one hundred MAX 9s in their fleet. They plan over five thousand weekly departures including several international routes this month.

The story of these airlines reflects both challenges and resilience as they continue integrating this aircraft into their operations despite past difficulties associated with it.