Originally Posted by
chrisleeroth
Will it be before I get to the airport like when I fly with United (5 Days before)?
Maybe. Just like with UA it can start at the upgrade window but no guarantees that it will happen then. Slightly different than UA, however, CO does the upgrades in sweeps that occur in 24 hour increments prior to the flight rather than building a list and then upgrading folks as seats open up inside the window.
Originally Posted by
chrisleeroth
I am flying from DEN to LAS and I dont see the usual "Upgrade Pending" next to my confirmation online like when I fly on United...
You will not, as CO doesn't offer this.