|Quoting planeguy727 (Reply 1):|
The LAX-DEN segment on a 763 is a PMUA a/c. If you are traveling in Econ you have a decent chance of being offered a buy up to E+. I don't see many Econ to Business/First buy ups showing up anymore.
From my experience last summer, flying from DEN
on a 772 (new config.) I was offered an upgrade from E to J for $200.00+ (I don't remember the exact price, but somewhere around that line) Although the night before the flight, I was already upgraded to E+ but my ticket was originally E. Also, it was a miles+money award flight.
I think you'd have a good chance, considering that's is a wide-body, so more seats are available. UA
has a lot of upgrade options, you could try checking your reservation 24hours before your flight, maybe they'll offer some upgrades.
[Edited 2012-02-12 05:48:57]
It's a cultural thing.