Stay away from DAL
until they get the labor stuff figured out. If there is ANY hint that NW
is going to settle the labor issue, go ahead and grab them - but not too much. CO
isn't a bad investment, though. Most of the majors will benefit on the news about crude prices - and, in general, will benefit this fall when demand isn't so high so production can keep up. All of the majors will rise a little come fall because of this.
There is so much movement right now, a decent day-trading strategy of limit orders/notifications will allow you to grab a few percent every week. Obviously, you will need to have enough cash volume in play so that your gains are stomped by your trade fees.