Airline Award/Upgrade Classes supported by ExpertFlyer.com®
Airline Class Description
Aer Lingus (EI) U Business - Awards and Upgrades
     
Air Canada (AC) I Business - Upgrade
  W Coach - Award
  D Exec First - Award
     
Air China International (CA) O First - Award
  I Business - Award
  X Coach - Award
     
Air France (AF) A First - Award
  O Business - Award
  E On transatlantic flights, E class is a Business Award booking class reserved for Flying Blue members with elite status. On all other flights, E class is a regular paid Economy fare.
  X Economy - Award
  W Coach - Awards reserved for Flying Blue members with elite status
     
Air New Zealand (NZ) I Business - Awards using Airpoints & Complimentary upgrades for Golds
  R Business - Complimentary Upgrades for Gold Elites
  Z Business - Upgrade
  O Premium Economy & Complimentary upgrades into Premium Economy
  X Economy - Award
     
Air Tahiti Nui (TN) A First - Award
  I Business - Award
  Z Business Upgrade only using Air Tahiti Miles, not miles of other airlines
  W Coach - Award
     
Alaska Airlines (AS) A First - Saver Award
  U First - Upgrade
  V Coach Bonus Travel Ticket (i.e. Bumps Ticket)
  W Coach - Saver Award
     
American Airlines (AA) F First - AAnytime Award & Paid Fare
  Z First - MileSAAver Award
  X First - Domestic upgrade from Coach using 500 mile Stickers/EXP Status/Y-B tickets for elites on 2 class flights. (Only available 24 hrs before the departure of the flight.) Also used for certain promotional upgrades by travel and corporate agents for international flights.
  A First - upgrade using Miles/VIP or restricted purchase of First on all 2 class Domestic flights
  J Business - AAnytime Award & Paid Fare
  U Business - MileSAAver Award
  R Business - Domestic upgrade from Coach using 500 mile Stickers/EXP Status/or Y-B tickets for elites on 3 class flights and on flights between the U.S., Canada, Mexico, The Bahamas, Bermuda, the Caribbean and between the U.S. and Central America. (Only available 24 hrs before the departure of the flight.) Also used for certain promotional upgrades by travel and corporate agents for international flights.
  C Business - Upgrade from Coach using Miles/eVIP on all 3-class and Int'l 2-class flights
  Y Coach - AAnytime Award & Paid Fare
  T Coach - MileSAAver Award
     
British Midland Airways (BMI) (BD) I Business Award
  X Coach Award
     
CSA Czech Airlines (OK) Z Business - Award
  E Economy - Award
     
Delta Air Lines (DL) G First - Domestic PMU upgrade
  V First - Domestic segment upgrade
  X Business - Domestic segment upgrade
  Z Business Elite - Int'l Upgrade with PMU or points
  E Coach - Promotional Award
     
Finnair (AY) U Business - Award
  X Economy - Award
     
Frontier Airlines (F9) S Coach - Award
     
Mexicana (MX) I Business - Award
     
Northwest Airlines (NW) A First (Domestic) - Award
  R Domestic - Upgrade to First for WorldPerks Elite members and using miles
  D Business (Int'l) - Award
  U Upgrade to Business for International Flights using Miles from a Discounted Coach Ticket
  Z Upgrade to Business for International Flights using Miles from a Full Fare Coach Ticket
  W Coach - Award
     
Qantas Airways (QF) X Economy - Award
     
Shanghai Airlines (FM) O First - Award
  I Business - Award
  X Coach - Award
     
SWISS (LX) O First - Awards & Upgrades
  I Business - Awards & Upgrades
  X Coach - Award
     
United Airlines (UA) R First - Saver Award [XF]
  F First - Standard Award & Paid Fare
  X First - Upgrade [NF]
  O Business - Saver Award [XC]
  C Business - Standard Award & Paid Fare
  I Business - Upgrade [NC]
  E Expanded Economy Award availabilty for Mileage Plus members who have 1K status.
  N Economy - Saver Award [XY]
  Y Economy - Standard Award & Paid Fare