Originally Posted by
eponymous_coward
Correct- you're confirmed for your later flight until you get the seat for the earlier one.
If you do same-day confirmed change, you're confirmed on the earlier flight (once you pay the $25).
Great! Thanks.
Unfortunately, when I tried to click the "Stand-By" button at online check in, I was told that my flight change could not be processed. I'm guessing that means that the stand-by list is already pretty full. I'll just try at the airport, I guess.