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The US airline has ordered 15 supersonic passenger jets which could cut travel times in half.
United plans supersonic passenger flights by 2029 - BBC News
United plans supersonic passenger flight
Concorde Revolutionized Air Travel. When Could Supersonic Flights
United will buy 15 ultrafast airplanes from start-up Boom Supersonic
Concorde: The Welshmen who got supersonic jets airborne
A new dawn for supersonic air travel? – DW – 06/14/2021
Boom Supersonic Debuts Design for Overture Passenger Jet
Inaugural flight marks major milestone toward return of supersonic travel
Independent Commission on Civil Aviation Noise
United wagers environmental and technical credibility in
A return to supersonic commercial aviation
United plans supersonic passenger flights by 2029