The aircraft choice was part of a larger effort to renew the airline's fleet, and today, it flies across American's network.

United will fly a total of 9,800 seats each way using the Boeing 777-300ER this month, making a total of 19,600 seats ...

The Boeing 777-300ER is the largest aircraft in the United Airlines fleet. United's models are configured to carry 350 passengers. The configuration is heavy on premium passengers, with 60 seats ...

All of these factors made the 777-300ER an ideal purchase for airlines, and some, like United, even acquired the type over a decade after it hit the market.