I'm taking my first legacy flight in a LONG time on a personal trip tomorrow with the wife, and I was wondering how the first class upgrade works. According to the check-in sheet earlier, 6 of the 12 first class seats are open, for a $100 upgrade each. I'm not a buyer at $200 for 2 people, as I'm already in row 4. (US 1190 MCO-CLT). I am a DM World Elite MC cardholder, but no status to speak of. I assume people with status who didn't take an upgrade would get 1st priority for a free upgrade, but then what happens? Would my bag fee be refunded too if I was upgraded, or was that only if I paid the $100 each? I'm not expecting it to happen at all, but I would like to learn a little more about how it works if I'm going to fly legacy carriers more often now.