Spacea

Space-A, short for space-available, is a United States Department of Defense program that allows eligible travelers to ride on DoD-owned or controlled aircraft when seats are available. The program is designed to provide transportation on a space-available basis to military members, retirees, and eligible dependents, as well as certain DoD civilian employees. It operates through a network of military airlift terminals worldwide and is managed under the U.S. Transportation Command with involvement from the Military Airlift Command’s successor organizations.

Eligibility typically includes active duty service members, their eligible dependents, retirees, and many DoD civilians. Access rules and priority can vary by location and mission, and not all travelers or destinations are available on every flight. Space-A travel is not guaranteed; seats are allocated only after mission requirements are met, and travelers may be asked to take alternative routes or wait for different flights.

Travelers must check in at a designated Space-A office, sign up for available flights, and wait for notification. Documentation such as a valid ID and appropriate travel papers for international legs is required, and baggage allowances and on-base procedures apply. While the flight itself is often free, travelers are responsible for ordinary personal costs such as ground transportation, meals, and lodging when away from the primary duty station.

Space-A is known for its flexibility but requires patience and travel flexibility. It is best used for nonurgent trips and as a supplemental option to other commercial or military transportation.