We had the free economy air and air+ for the Antarctic cruise too. I opted to back out and arrange my own tickets. I had so much trouble trying to upgrade my air+ tickets for last summer on Delta (our preferred airlines), I decided not to risk the chance. We prefer Delta1 or business for such long flights. I was told by a supervisor last summer that the Delta contract is not as flexible as it used to be so that’s why they’re using other airlines more. Don’t know that that is true but with all the airlines craziness right now, I’d prefer to work with Delta directly. Our flights have changed once since booking, but I could get in and choose other times quite easily. I check my tickets every morning (we have 3 upcoming trips). That way, I can initiate changes to my liking before Delta even officially contacts us by email about changes to flight schedules. .