Shares of United Continental (UAL - Get Report) are moving up about 2% Tuesday after the company beat on top- and bottom-line earnings estimates

Could this be the last bad quarter for the airlines? That's what a lot of the chatter has been about, TheStreet's Jim Cramer, co-manager of the Action Alerts PLUS portfolio, said on CNBC's "Stop Trading" segment. 

Other stocks in the industry are beginning to rally, too, he added.

At the moment, the airline stocks are trading with such low valuations that it's investors' way of saying that next year's results will be worse, not better. However, if the airline companies stay true to the plan of not increasing capacity, then the results in 2017 will certainly be better, Cramer reasoned. 

"I think the group is a buy," Cramer concluded. 

At the time of publication, Cramer's Action Alerts PLUS had no position in companies mentioned.