Originally Posted by
be_rettSEA
It should be T-24 for both. You may just need to call or chat in for help.
I don't know whether I experienced a glitch, or have uncovered another IT weirdness. I had been logged into my account which contained both reservations and ran check in from there. When I ran it for her, it didn't have a "Change Flights" option. I tried logging out of my account and logging in to her account and running check-in from her account. When I did that, it gave me the Change Flights option and I was able to make the change and even got a bonus instant upgrade to F on the new flight. So maybe check-in needs to be run from the account of the customer or at least while not logged in to someone else.