American Airlines agrees to buy 20 supersonic planes from Boom

American Airlines has agreed to purchase 20 supersonic Overture planes from Boom Supersonic, the companies announced Tuesday.

The deal is the second firm order in the last two years for Boom, still years from building its first commercial airplane. United Airlines made a commitment last year to buy 15 Overture jets.

“Passengers want flights that are faster, more convenient, more sustainable and that’s what Overture delivers,” Boom CEO Blake Scholl told CNBC. “Flight times can be as little as half as what we have today, and that works great in networks like American...