Originally Posted by
yohanson
It's in quotes for a reason. In the past, Delta held about 50% of it's FC cabin for Medallion upgrades. They don't do that any more on many flights so I think I'm being accurate when I say "FCM Window" as it relates to Medallion upgrades and FCM. Typically the discount F fares drop near the DM/PM window from what I've noticed.
Delta never
held seats for Medallion upgrades. If you called a week before the flight and wanted to buy all the (unsold) seats in F they'd gladly sell them to you.
Delta used to make a lot more seats
available for Medallion upgrades, figuring it wouldn't sell too many F seats at high prices at the last minute.