President Donald Trump reportedly cut more than $1 billion off the price tag on two of Boeing's new Air Force One airplanes.

Speaking at a "campaign rally" in Melbourne, Florida, on Saturday, Trump told the crowd of more than 9,000 that just one hour of negotiations with Boeing CEO Dennis Muilenburg saved the American taxpayers more than $1 billion on the new airplanes.

"We've got that price down by over $1 billion and I probably haven't spoken for more than an hour on the project. I got the generals in who are fantastic … but I told Boeing that isn't good enough, the price is still too high," Trump said, according to the Washington Examiner.

Documents released last December revealed that taxpayers would be on the hook for $4.2 billion to replace the two outfitted, Boeing 747s that the president uses to fly around the country and across the world.

That, however, did not go over well with Trump, who later revealed that he secured a personal promise from Muilenburg that taxpayers would not pay more than $4 billion on the project.

Still, Trump said Saturday that he doesn't understand why the government needs two identical Air Force One planes.

"Why they need two planes, we'll have to talk about that," Trump said, according to the Examiner.

Typically, a second plane identical to Air Force One flies with the presidential convoy, especially to foreign nations, to act as a decoy.