Airline Award/Upgrade Classes supported by ExpertFlyer.com®
Airline Class Description
Aegean Airlines (A3) I Business - Award & Upgrade
  X Economy - Award
     
Aer Lingus (EI) U Business - Awards and Upgrades
  T Economy - Awards
     
Aeroflot (SU) O Business - Award & Upgrade
  X Economy - Award
     
Air Canada (AC) R Business - E-Upgrades
  Z Upgrade into Business from full-fare Coach (Y/B) or Premium Economy (O) fares on North America flights.
  N Premium Economy - Award & Upgrade
     
Air Europa Lineas Aereas (UX) Z Business - Classic Award/Upgrade
  I Business - Flex Award
  A Economy - Classic Award
  B Economy - Flex Award
     
Air France (AF) F First Flex Award for Flying Blue members with elite status, and Promo First awards for all members.
  O Business - Classic Awards
  C Business Flex Award for Flying Blue members with elite status
  A Classic Premium Economy Award for Long-haul flights with a separate Premium Economy cabin.
  S Expanded Premium Economy Award availability for Flying Blue members with elite status as well as Flex Awards on Long-haul flights with a separate Premium Economy Cabin
  L Expanded Economy Award availability for Flying Blue members with elite status for long-haul flights.
  X Economy - Classic Award
  T Flying Blue Classic Europe Awards are for Air France European and domestic flights at 25% more miles compared to Economy Classic awards.
  B Economy - Long-haul Flex Award
  W Flex Premium Economy Award on Short/Medium-haul flights, the Economy Flex award is presented as Premium Economy, however books into the Economy cabin.
     
Air Malta (KM) Z Business - Award
  X Economy - Award
     
Air Mauritius (MK) I Business - Award
  X Economy - Award
     
Air New Zealand (NZ) A Premium Economy & Comp upgrades into Premium Economy
     
Air Serbia (JU) N Economy - Award
     
Air Seychelles (HM) Z Business - Award
  X Economy - Award
     
Air Tahiti Nui (TN) F Business - Award
  Z Business Upgrade only using Air Tahiti Miles, not miles of other airlines
  I Premium Economy - Award
  U Economy - Award
     
Alaska Airlines (AS) D First - Refundable Award
  E First - Saver Award
  U First - Upgrade
  V Coach Bonus Travel Ticket (i.e. Bumps Ticket)
  N Coach - Mid-level Choice Award
  Y Coach - Refundable Award
  T Coach - Saver Award
     
American Airlines (AA) Z First - Partner Award (for 3-cabin flights only)
  A First - upgrade using Miles/SWU or restricted purchase of First class on 3-cabin flights only. **Search segment-by-segment only.
  U Business - Partner Award (Including 2-cabin Domestic First)
  C Business - Upgrade from Coach using Miles/SWU. Includes 2-Cabin First domestic upgrades. **Search segment-by-segment only.
  X Premium Economy - Partner Award
  E Coach - Employee Travel and Confirmed Flight Changes
  T Coach - Partner Award
     
Azul (AD) R Business - Award
  Z Economy - Award
     
British Airways (BA) V Additional Economy Award space for Gold Elites on BA operated flights
     
Canadian North (5T) W Economy - Award
     
China Southern Airlines (CZ) F First - Award
  O Business - Award
  S Premium Economy - Award
  X Economy - Award
     
CSA Czech Airlines (OK) Z Business - Award
  I Business - Upgrade
  E Economy - Award
     
El Al (LY) A First - Awards & Upgrades
  X Business - Awards
  P Premium Economy - Awards & Upgrades
  E Economy - Awards
     
Emirates (EK) O Business - Non-partner/Flex Award
  W Economy - Non-partner/Flex Award
     
Finnair (AY) U Business - Award
  X Economy - Award
     
Gol Transportes Aereos (G3) I Business - Award
  X Economy - Award
     
Gulf Air (GF) P Business - Award
  T Economy - Award
     
Hainan Airlines (HU) J Business - Award
  S Economy - Award
     
Hawaiian Airlines (HA) P First - Flex Award/Upgrade
  D First - Saver & Partner Awards
  A First - Saver Upgrade
     
JetBlue Airways (B6) P Economy - Partner Award
  I Mint - Partner Award
     
Kenya Airways (KQ) O Business - Award & Upgrade
  X Economy - Award
     
KLM (KL) C Business - Flex Award for Elites
  Z Business - Upgrade with DL SWU/Global Upgrades & Fare Class
  T Flying Blue Classic Europe Awards are for KLM intra-European flights at 25% more miles compared to Economy Classic awards.
  B Economy - Flex Award
     
Korean Air (KE) A First - Award & Upgrade
  Z Business - Upgrade
     
Kuwait Airways (KU) A First - Award
  C Business - Award
  W Economy - Award
     
Martinair (MP) W Economy - Award
     
Philippine Airlines (PR) Z Business - Upgrade
     
Qantas Airways (QF) P First - Award & Upgrade
  U Business - Award & Upgrade
  Z Premium Economy - Award & Upgrade
  X Economy - Award
     
Saudia (SV) A First - Award & Upgrade
  L Economy - Saver Award for Alfursan Members
  M Economy - Value Award
     
Shanghai Airlines (FM) A First - Award
  O Business - Award
  X Economy - Award
     
Turkish Airlines (TK) I Business - Award
  J Business - Upgrade
  X Economy - Award
     
Xiamen Airlines (MF) F First - Award
  O Business - Award
  X Economy - Award