Those of you who fly with only carry-on luggage, what difficulties have you encountered getting through security and then checking in at the gate with either a paper ticket or an e-ticket when there has been a schedule change for your flight, particularly when the flight number has been changed as well as the time? Since the time I booked two different trips for my daughter, one trip has a changed flight time and the other has changed the flight number as well as the time. I'm told by AA that to check in at the gate the paper ticket or e-ticket have to show the correct time. However, I wonder, because another agent said it was not a problem. What has been your experience? Schedule changes are a common occurence now and it's difficult to keep the paper work up to date. Surely, the computers at the gate must have the correct information for that passenger. I would think that as long as the ticket has the name, date, locator code, and ticket number, the passenger would be able to check in at the gate regardless of schedule changes. Or am I being too optimistic and giving them too much credit.

Also, if you think I'm posting this in the wrong forum, please tell me which one you think would get a better response. Thank you.