<<i get 1-1dollar>>

Thank you for the clarification. In Dallas American Airlines' miles would seem to be more useful than United Airlines' miles, that's why I suggested that you consider using a Citibank AAdvantage card in lieu of (or in addition to) the Chase card. Citibank offers both AAdvantage debit and credit cards.

<<explain what you mean by last paragraph>>

From your original posting I understood that you were using a Chase debit card only because you could not obtain a Visa or Mastercard credit card with a sufficient line of credit to cover $40,000 per month. My suggestion is that you could use two cards, a credit card which would earn miles on the airline of your choice plus the debit card. You would use the credit card until you reached the credit limit, then switch to the debit card. If you can make frequent payments to the credit card issuer you might be able to charge more than the credit limit in one billing cycle.

You may also wish to investigate Diners Club Mastercard. Like American Express it is a charge card with no predetermined credit limit, but because it is a Mastercard your vendor would accept it. Diners Club Rewards points can be converted to most domestic US airlines, excluding CO, NW, UA and US, and to several international carriers.

dennis