When a deal is Not Available, it means the deal has sold out or is no longer available for the date you are looking for. Some resorts elect to stop selling their discounted tickets on Liftopia around 24 - 72 hours (or longer) before the start date.
When a deal is Not Available, we no longer have any tickets available to sell on that date.
You may also find some days on the date selector calendar as greyed out and not selectable. This could be due to the resort selling out for the specific date or they are not offering tickets due to being closed. In the example below you can see when a date is not available for purchase as well as when a date is available and you can also see your current selection as marked by the blue circle on the date.