"That was an unbelievable quarter. The free cash flow there is extraordinary. The capacity, which had been such a big issue there, is going from zero to 2 percent next year," he said on "Squawk on the Street."
Cramer made his remarks after the airline posted third-quarter earnings per share of $1.74 on revenue of $11.11 billion, beating Wall Street's estimates.
"Forty percent of this is international, so I was surprised it did so well. This is a strong buy right here right now," Cramer said.
Shares of Delta were up more than 2 percent late morning Wednesday.
Disclosure: Cramer's trust did not own Delta's stock when this article was published.