Space Available Flight: Boarding Procedures
Normally, a space available roll call will be conducted 1 1/2 hours prior to departure on CONUS flights and 2 hours prior on OCONUS flights. Selection will begin with the passenger having the highest category of travel with the earliest date/time of sign-up. In other words, the terminal personnel will call passengers beginning with Category I and work their way down to Category VI until all available seats are filled.
You must be present when your name is called to be ensured a seat on the flight. Space available passengers arriving at the flight information counter after a specific space available call has begun must wait until all other space available passengers in the backlog have been afforded an opportunity for open seats. We recommend you arrive at least 15 to 30 minutes prior to all scheduled roll calls. And keep in mind all flights are subject to change without prior notice.
You must also be "travel ready," if not, your acceptance for space available travel may be denied.
Once selected for space available travel, you will be required to show your ID card and all other pertinent documentation.