Originally Posted by
rjque
Unless you are buying full fare tickets, don't be surprised if you never see an upgrade on SFO-EWR, even as a plat. I can't tell you how many times I've tried to buy F a week out and ended up on DL because every CO flight was already sold out.
And this will be a problem when CO leaves SkyTeam and/or ends the DL relationship -- J on UA transcons can be significantly more expensive than CO F, particularly for close-in bookings.