United Fare Class chart. I may have spliced it together in MS paint, but I still keep it handy to frequently reference. For those who want to understand fare classes, I hope
Decoding United's revenue, award and upgrade fare classes - The Points Guy - The Points Guy
Generation Z - Part One - FareCity
farez | Drupal.org
Fare Warning Patchwork Straight Leg Jean FARE WARNING | South Moon Under