Moderator, Omni, Omni/PR, Omni/Games, FlyerTalk Posting Legend
Join Date: Oct 2004
Location: Between DCA and IAD
Programs: UA 1K MM; Hilton Diamond
Posts: 67,145
Any Hawaii flights used to be gimmies for CPU for 1Ks. As would off-days like Wednesday.
However, in my anecdotal experience (and not just on Hawaii flights--this observation is system-wide), UA also makes upgrades and outright F purchases much more affordable and enticing on those days & flights, which makes them harder to achieve via CPU.
My murky crystal ball is hence saying 20%...