American Airlines has placed an order for up to 20 aircraft from Boom Supersonic, with plans to bring back supersonic transatlantic flights before the end of the decade.

Boom’s Overture jet promises speeds of up to Mach 1.7, which, although lower than Concorde, is twice as fast as today’s commercial aircraft.

The first superfast jets are expected to begin rolling off the production line in 2025 and the first commercial flights are due to launch in 2029.

American is the third airline to place an order for the supersonic planes, following United and Virgin Atlantic.

All three airlines are expected to offer supersonic flights from London to New York in less than four hours and London to Miami in less than five.

The supersonic jets will carry 65 to 80 passengers each, which is fewer than Concorde offered, but seats are expected to be priced at business class fares, so they should be cheaper than Concorde.

American said it has the option to increase its order to 40 Overture jets in the future.