Explanations on Different Airfare Classes (e.g., L, K, Y, etc.)
In order to fully understand the airline industry, I would like to know the definitions for the various airfare classes. For instance, I know that an L class fare is the lowest, K is about $20 more than L (at least on Delta). What are the other classes for U.S. domestic airfares and the differences in price between them? I know that some agents do not explain the differences--I want to be more informed when I book a reservation. Thanks.
MLB