Join Date: Aug 1999
Location: Alexandria, VA, USA NW Platinum Elite Since 1999, United GoldMM, Hyatt Discoverist, SPG Gold, Hilton Diamond, Hertz #1 Gold, IC Ambassador
Posts: 7,451
For Domestic Upgrades, Full Coach would be considered a "Y" or "B" fare, Select Coach would be the rest, dependant on what the fare rules specify.
For International Upgrades, Full Coach would be considered a "Y" fare, Select Coach would be "B" and "M" (to Asia excl. China)