[reallydontask]

A Transatlantic crossing took around ~ 100 hours, whereas a plane takes ~ 7 hours. So, we are talking about an order of magnitude improvement.

It's hardly the same thing with a supersonic airliner, which just reduces the time in roughly half.

[credit_guy]

However, the first commercial passenger transatlantic flights took 29 hours, on the Panam B-314.

http://www.century-of-flight.freeola.com/new%20site/commerci...