I love Southwest!
Due to them being new to the Denver area, we have never flown them. Just booked our Thanksgiving airfare, and realized I had clicked on the wrong button for our return fare. Had several screens up and trying to book quickly, used the wrong screen and booked the wrong return date. Just went into the change flights - changed it for the next day, and it asked me if I wanted a refund. No change fee, and although the fares were the same, the taxes were different, so it offered me the choice of a small refund! If I had tried to do that on United (which we love and usually fly), I would have incurred a huge change fee per passenger and certainly not a refund!
Thanks to all here that take the time and patience to educate us newbies. I would have panicked and not known about being able to change if I had not read it here!