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cabin-codes

IATA cabin codes (F/J/W/Y) and saver fare class codes (X/I/O) for reading award inventory and determining partner-bookable availability.

Published by borski ↗borski/travel-hacking-toolkit

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name: cabin-codesdescription: IATA cabin codes (F/J/W/Y) and saver fare class codes (X/I/O) for reading award inventory and determining partner-bookable availability.category: referencesummary: IATA cabin codes (F/J/W/Y) and saver fare class codes (X/I/O) for partner-bookable inventory.

Cabin Codes

When reading Seats.aero results or discussing award inventory, these cabin codes appear:

CodeCabinNotes
FFirst ClassIncludes true first class suites
JBusiness ClassLie-flat seats on long-haul
WPremium EconomyAlso sometimes coded as "P"
YEconomyStandard seating

Fare Class Codes for Saver Awards

These are critical for partner bookings. If you see these fare codes available on united.com (or equivalent), the flight is bookable through partner programs at their (often lower) rates.

CodeMeaningPrograms That Use It
XEconomy SaverUnited MileagePlus, bookable through partners
IBusiness SaverUnited MileagePlus, bookable through Turkish M&S and others
OFirst SaverUnited MileagePlus

Why This Matters

Partner award rates are often dramatically lower than the operating airline's own rates. United business saver (I class) bookable through Turkish Miles&Smiles is a classic example: a route that costs 80,000 United miles might only cost 45,000 Turkish miles. But Turkish (and other partners) only sees the saver inventory. If only "standard" or "everyday" fares show on united.com, partners cannot book that flight.

When checking award availability for a flight you found on a partner program (Turkish, Aeroplan, ANA, etc.), verify the saver class is open on the operating airline's site before transferring points.