Join Date: May 1998
Location: Reno, NV (RNO)
Programs: AA LT Platinum, AS, UA Premier Silver, DL, HHonors Gold, Marriott LT Titanium, Hyatt, IHG Platinum
Posts: 4,723
Looks like Efrem and PremEx have been lead astray by UA and AA with regards to DL upgrades and their use on discount fares. Clearly AA and UA upgrades are much, much more expensive (mileage-wise) than DL or US.