Space Available (Space-A) travel allows authorized passengers to occupy Department of Defense (DoD) aircraft seats that are surplus after all Space Required (Space-R) passengers have been accommodated. Space-A travel costs nothing but is allowed only on a non-mission interference basis.

As of March 26, 2026, the new AMC Travel Self-Signup Tool for Space-A & Space-R Travel is now live for all AMC locations: https://gatesea.mtmc.gov/amctravel/