If you are checking bags, you must check in at least 45 minutes before your flight.

Allow extra time for flights departing Black Rock City on the last Sunday and Monday of the event. You and your luggage will be weighed, and after all passengers are present, manifests and weight/balance sheets will be prepared in accordance with FAA regulations.  If you are not checked in 30 minutes before your scheduled departure, you may not be accommodated on the flight.