I know that booking classes are delineated in many places but is there a decoder for each digit/letter of the "Fare basis code" that shows up on UA's review pages? For example, "QKXANE" or "SKXSNY2E". I presume each letter corresponds to some portion of the Fare Rules but does FT have this decoded?

Bad presumption. Some of the letters may (like N for non-refundable, or W/X for weekend/weekday fare), but others do not.

I think fare basis codes are supposed to have a standard, consistent logic, but you will find that most, if not all airlines, have very different naming conventions. Even within the same airline you will have large differences.

The only letters that I know the definition for are when a fare basis ends in "N". N=Non Refundable. (GA told me once). Also she said usually the last numbers are the advance purchase time ie: XXXX7N. Is 7 day advance purchase/non refundalble. And somewhere in there is the fare bucket: F/A/Y/Q etc. The rest are a mystery to me.

There is an IATA standard (e.g. first character is booking class, next 2 characters is season or day of week, etc.) United does not follow these standardizations. There are hundreds of thousands of FBCs. Save your engergy.

I think there is an IATA standard for international flights, but domestic is more of a free for all. It would be nice though - instead of trying to read 25 pages of T&C's just buy a ticket.

Thank you, JLaw and everyone ... I do just buy the ticket but I generally only fly tatl and have been recording FBCs since last fall. Sometimes they're split (outbound different than in), and fares seem to change or correspond to the specific FBC. HKXANE is sometimes a good one-upgradeable and not too high a fare. The first letter has always corresponded to the fare bucket.

That's the case for UA, not for some others.@:-) Fare codes are airlines specific. Actually, UA also sells net fares which books into a different bucket than the first letter of fare basis.

As others have said, sometimes is corresponds, sometimes not. If you want to find the "secret decoder ring", you need IATA's Passenger Services Conference Resolutions Manual, Reso 728. (Of course, said secret decoder ring may not always apply).

If you want to read some about how and why they are split, I have a post in this thread about it.

Anyway, for your amusement (because this information doesn't really help you as a passenger as your booking code and actual fare rules are more important):
QKXANE/HKXANE: Q/H=discount economy (I think UA further defines these in their contract of carriage)
K=Shoulder Season
X=Weekday
AN= Advance Purchase Non-refundable
And that's pretty much it. What does the E stand for? Eastbound, but that's a UA/LH thing (not an industry thing) since UA controls eastbound Transatlantic fares and LH controls westbound TATL fares in the UA/LH partnership.

SKXSNY2E
S=discount economy on UA
K=Shoulder Season
X=Weekday
After that it doesn't really follow IATA standards, but my guess is:
SN=instant purchase non-refundable
Y= valid for 1 year
2= 2nd level fare
E= Eastbound

For sure. Especially between geographies.
And of course when you're on an F or C fare and get stuck on a plane without those cabins you'll be booked in Y class on that segment.

No it doesn't. There are V-UP, W-UP, Q-UP, H-UP, M-UP, B-UP, and Y-UP fares that variously book int P, A, and F.

Awesome! Whlinder and you, too, M-man

The poor guy/girl was only talking about personal experience with his/her tatl tickets. no need to wail on him/her like that - sometimes it does pay off to read the whole post instead of focusing on one sentence out of context.

Fare basis codes are what they are. Letters that may or may not indicate some of the rules associated with the ticket

I feel a much LARGER issue is standardization of what an e-tkt should look like. Sure, all the big U.S. carriers allow you to check a ticket status , or ticket number on a carriers website.
Before e-tkting, we all knew what a paper ticket should look like. A rectangular coupon on card stock document with the ticket number at the bottom center, and whether you bought it through a travel agent or an airline they all looked the same

But now, particularly with international airlines, how does one know if a ticket is real, valid and the underlying rules? Take Cathay as an example. From my experience, their website can only be used to verify e-tkts purchases on the airlines own website. I think the same is true with SAS. You call them and sometimes they just tell you to call the agent even though they may have charged your credit card directly.

While many consolidators and brokers may have special deals, many are extremely sensitive about showing the true fare paid so they create their own documents which do have an e-tkt number and booking reference, but often leave out terms like ticket validity , change fees, refund penalties etc.

With airlines that don't have a presence in North America like TAAG of Africa, how do I know that the ticket is real and when I show up in Africa witha piece of paper printed by a TA they don't laugh at me silly.

I am surprised that has not been a bigger problem, but when I buy baseball tickets I receive them by e-mail as well but there is a standardized bar code which is scanned at check in whether purchased from a broker or the venue directly.

When I buy insurance from an agent, the insurance company takes ownership of the transaction and then e-mails or snail mails me ALL terms of the policy I have purchased, and the premium may be less than $1,000 a year.

An international airline ticket can cost thousands for a single trip , the airline is supposed to hold the money prior to the trip but if a ticket is purchased with a consolidator the airline doesn't want to talk about the transactions and refers you back to the TA/consildator. You cross your fingers with the wholesaler that what they are giving is complete and accurate.

While the industry has already moved for 100% e-tkts without a standardized understanding of what the passenger is to receive in place of old fashioned paper the system is flawed

I was responding to an incorrect statement. If you like propagating misinformation, perhaps this forum is not for you.

I think you need to re-read the statement you quoted:

The first letter has always corresponded to the fare bucket.

The poster was talking about his/her experience since tracking this. Or are you saying that for his/her flights the first letter has not always corresponded to the fare bucket?

In any case, I have found this thread useful. Thanks everyone who provided some insight into this.