Originally Posted by
highops
Upgrades to C+ and first do not qualify. If you call say you do not know what the difference is between these and a seat selection fee they sometimes make a one-time customer service adjustment.
Thanks for the clear and quick reply! I think I won't bother to spend a bunch of time calling and haggling when it looks like it'll be pretty easy to just do the "overage" trick - my wife has some Delta eCredits we can use for partial payment some time this year.