United Airlines agreed to purchase 15 Boom Overture aircraft with an option to buy 35 more. They are currently scheduled to begin servicing passengers in 2029.
Nextbigfuture has been covering Boom Technology and the other commercial supersonic plane companies for years. In 2016, Boom Technology was planning to get certified to start commercial service in 2023. Five years have passed and the schedule has slipped six years. In 2016, they had full-size mockup of a smaller test plane. They have made a functional version of the one-third scale test plane, XB-1. The test plane is supposed to fly this year.
The test plane uses a version of the General Electric J85 engine. The J85 has been used since the 1950s.
By April 2017, enough financing was secured to build and fly the XB-1. Its preliminary design review was completed by June 2017, with a switch of engine to the military version of the J85 to take advantage of the extra thrust. The XB-1 testing schedule kept slipping.
Boom's plan is to develop a plane able to go Mach 2 with 65-85 passengers. All travellers would pay about $5000 per ticket. this would be like high end business class or first class.