"Online travel is a $300 billion business and growing rapidly," said Jim Cramer. That, however, does not mean buy all of the stocks in the space.
Although online travel sites may all seem the same, Cramer said they're actually 'miles apart' and the space is fraught with land mines.
"There are enemies at the gate," Cramer said. He reminds that Google plans to build a presence in the industry, and he worries that other heavyweights could follow.
"That's why I want to stick with the online travel firm with the best execution."