Delta vacation is pay no credit. The amount of vacation hours you are due in a month is applied to your PBS bid and counts toward the max award. Once the bids are closed vacation is strictly straight pay zero credit and you can pick up well above the normal max. If you have a week of vacation paying 26:15 and the cap is 80 you can pick up to 80 hours pay and credit and receive the 26:15 on top of that for 106:15 in total pay. This is sadly essentially a back door to selling your vacation back to the company.