Originally Posted by
snod08
Upgrades for cash may be offered at check-in if there is space available in the front cabin (after all the Elites and their companions are checked-in).
Elites dont need to be checked in or upgraded before CO offers upgrades.
CO will offer upgrades (fee-waived buy-ups) to anyone that trumps Elites. Their position is that these are buy-ups, so they're now paid F passengers, trumping Elite upgrades.
Check at a kiosk for this.