Upgrades available on all tickets. Charges are $49, $69, $99 or $129, depending on distance. It is charge per segment. 2 checked bags, normally $20 and $25, are free. I would suggest doing the upgrade online, at the 24 hour mark, they can go quickly. If you are using points, 4 are needed, you can upgrade on the phone at midnight of the day before your flight. If you were flying at 8 AM on Wed, you could call at midnight Mon/Tues to upgrade on the phone. If doing it online at 24 hours, it is 24 hours exactly, not a minute (or a second) before.