in nothing flat” = immediately, without delay
You used to be able to get through airport security in nothing flat, but it takes more time now because of increased security measures.”

up in the air” = not decided yet
Our travel plans are still up in the air, but we should know more by tomorrow.”

Utah Travel Ad

The announcer highlights the _______ of Utah.
The tour lasts ____ days.
One activity mentioned in the video is ______.
The tour does not include _____.
Reservations must be made _____ days in advance.