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Supersonic passenger planes could to the skies before the end of this decade. Supersonic faster than the speed of sound. The speed of sound Mach 1, which is 1,234.8kph. The US carrier United Airlines plans to buy 15 supersonic jets from a company called Boom Supersonic. The planes will up to 88 passengers in an all-business class service. They will fly at a top speed of Mach 1.7. This is 2,099kph. Most modern passenger jets a cruising speed of just over 1,000kph. The new planes could greatly the time it takes to fly around the world. Passengers could from London to New York in under four hours. It currently around 7 1/2 hours to that journey.

The jets by United Airlines are called Overture. They will the first supersonic jets to make commercial flights since Concorde stopped in 2003. Concorde was jointly by British Airways and Air France. The cost of Overture tickets will be roughly the same as regular business class tickets. The price of a Concorde ticket over 20 times higher than economy class tickets, which only the super-rich could afford one. Boom's CEO said Overture will much better fuel efficiency and profitability than Concorde. Flights will net-zero carbon and will sustainable aviation fuel. The cost of each Overture airplane is approximately $200 million. Boom already around $6 billion in orders.

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