Delta Air Lines, Inc. (NYSE:DAL) is one of the stocks in Jim Cramer’s game plan for this week. Cramer called it a tough stock to own, as he said: “Now we’ve got a couple of important earnings reports on Thursday, including PepsiCo and Delta in the morning… Delta’s a tough stock to own. It’s been among the best performers in the group, yet it’s still down 5% for the year. I know that consumer’s supposed to be weaker, but there’s still an appetite for travel. I think it might work as a trade, but like I say ...