The investment includes a conditional agreement for up to 100 aircraft, with an option for 100 more, contingent on JetZero achieving key milestones.

United Airlines has announced an investment that, if successful, will see it boost its sustainability credentials while taking its fleet to the next level. Specifically, as revealed yesterday, the US legacy carrier and Star Alliance founding member has teamed up with JetZero on a deal for a conditional order of up to 200 of the startup company's Z4 blended wing body (BWB) aircraft.

United Airlines investment outlines a potential order for up to 100 aircraft, with an option for an additional 100.