Originally Posted by
canadiancow
That chart is very outdated.
S is the highest of the "low" fare classes. K is the lowest fare class. "Tango" (now "Standard") is an independent concept from fare classes.
Originally Posted by
yyznomad
Holy schmoly. What the heck were they thinking? It was difficult enough trying to navigate the fare class alphabet soup, now we have to deal with this nonsense.