I think I know that answer to this question but.... This special expires on 3/31/2025 . Why is this special necessary? Can't you just go to the Delta Vacations section (or call Delta Vacations hotline), and book any travel (air, hotel, car) and that has no expiration date for travel? I am thinking that Delta Vacations is more restrictive and needs to be combined with an air itinerary, but I am curious to others take on this....