A day after US Airways and American Airlines agreed to merge into what will become the world's largest airline, CNBC's Jim Cramer said Wednesday that US Airways shares could double.
"And don't forget, these companies just got much more lucrative for the first time ever," Cramer said on "Squawk on the Street." "It will cost you more to fly. Obviously, they will refute that."
(Read more: Antitrust lessons for future mergers in U.S. airline deal)