EF1American Airlines’ roll-out of a new bundled fare structure this week has created some confusion among frequent fliers about what the change means to the way they book tickets. They have nothing to worry about — at least for now. American is not changing the decades-long practice of how fares are published on an airline tariff, and fears of a lack of transparency are misplaced.

You can still see in which booking class your ticket will be issued, though it’s indeed a bit confusing how exactly one would know the difference between the three new fare types by looking at that booking class, which could be the same for all three fares. So let’s break all this down and try to make sense of it.

First, what has American changed? It has bundled products and services that airlines have been unbundling for a few years, though some of those extras like certain seats are still sold separately. When you search domestic fares in the contiguous 48 states on its website, you now get three tabs: lowest fare, refundable (both coach) and Business/First Class. The default tab is lowest fare. In that category, there are three types of fares, as shown below for a one-way trip from Washington to Los Angeles…