As of today, if the air line boots your from your flight (and you didn't vol un.teer to be boot ed) and the air line gets you where you need to go with in two hours, you can look for ward to get ting dou ble the value of that ticket (with a cap of $650). Beyond that, the pay out is four times the ticket's one-way value, for a max of $1,300. That's big money, paid in vouch ers. But, as we've said before, you should insist on cash—as in green hundred dollar bills—because the alternative, vouch ers, can have expi ra tion dates, and the air line may not offer the best tick et for you for routes you're fly ing before the expiration date. The play would be finding which routes are constantly oversold, not checking in until last minute and crossing fingers for the bump. Any ideas?