is there an option to add a specific date from when your leaving to when you return to search those specific date prices?
We do not support availability information yet, thus we cannot make use of the date information. All we do now is to show the published award chart. In reality, when you try to redeem award ticket, some dates may require more miles, some dates may not be available --- you need to check that yourself.
But we do provide the option to add specific date when you search ticket price (with cash instead of miles). Just click on any "show cent/mile" link to see it.