Lockheed Martin, Northrop Grumman and Boeing came up with the designs and all the three companies won a contract from the US space agency to research, develop and test their concepts in 2011, the `Daily Mail` reported.
The designs came about after NASA revealed it was aiming to develop a line of "super planes" that are faster, larger, quieter - and burn fuel more efficiently and cleanly than their present counterparts.
Criteria set by NASA meant that each design had to fly up to 85 percent of the speed of sound, cover a range of about 7,000 miles and carry between 50,000 and 100,000 of payload; either cargo or passengers.
Now, each of the three companies will spend the rest of this year exploring, testing and simulating their designs in the hope that NASA will choose it for development.
A spokesman from technology and innovation website `Fast Company` was quoted as telling the `Huffington Post`, "Given how long it usually takes to craft an aircraft from scratch, and bearing in mind how many technical hitches the revolutionary Boeing 787 Dreamliner has suffered, these are the sorts of aircraft that these three firms are probably beginning to design for real right about now."