Join Date: Feb 2002
Location: DEN (Boulder) ~ UA 1K, Hyatt Diamond, US Gold, Marriott Platinum, Starwood Gold, LH SEN
Programs: Hyatt, United, Starwood, USAir, Marriott, Lufthansa, Hilton
Posts: 1,514
A couple of things to consider:
Are you trying to get to a status level and need the mileage to get it?
Can you check to see if there is upgradeable space with mileage when you book it?
Are you a high enough status level to be able to clear the upgrade list?