Originally Posted by
Kamadan
Kind of...
https://www.airnewzealand.co.nz/star-alliance-united
A, F are First Class earn
C, D, J, P are Business Class earn
Z falls under Full Economy earn
Most domestic UA First Class flights either book into full A/F, or more often P or Z.
P is a good compromise between cost and SP earn
I personally avoid booking into Z as it's a step down in SP earn and often no cheaper than P inventory (in my experience)
If I remember correctly, P is the class in which I was able to find ludicrously cheap tickets in the domestic US in the past, especially for short flights. Sometimes only 20-30% more $ than a Y fare, but double or triple the SP earn. But I only did this maybe 3-4 times and it was a year or two ago, so not sure if the deals are as good anymore (or maybe I lucked out those times, who knows).