Originally Posted by
javabytes
The only two things the link won't tell you:
1. Y/B/M tickets are pricey. More so than you might think. And more so than discounted business in some cases.
2. Inventory bucket you're looking for, if using ExpertFlyer or similar, is Z.
If you don't have EF you can get the reps to confirm availability for you. You can also waitlist, but I never waitlist. If I can't confirm I don't book. I'm not sitting in the back on an M fare.