Regulations & Resources
Authoritative references, policy documents, and planning tools that govern and support Space-A travel.
Core Policy & Regulations
DoD Instruction 4515.13 – Air Transportation Eligibility
The governing Department of Defense policy for Space-Available travel. Defines eligibility, categories (Cat I–VI), priority, required documents, and approved travel segments (Table 3).
View DoDI 4515.13 →USTRANSCOM DTR Part I, Chapter 103 – Operational Support Airlift
Details Space-A flight categories, mission scheduling, and operational procedures across all services.
View DTR 103 →Eligibility & Category References
DoDI 4515.13 Table 3
Lists each eligible traveler type, Space-A category, and authorized travel segments (CONUS↔CONUS, CONUS↔OCONUS, OCONUS↔OCONUS).
Open Table 3 →MyAirForceBenefits
Eligibility guidance for Active Duty, Guard, Reserve, Retired, dependents, Medal of Honor, and certain veterans.
Visit AF Benefits →MyArmyBenefits
Army / DoD perspective on Space-A eligibility—applies to joint travelers as well.
Visit Army Benefits →VA / WarriorCare – 100% Disabled Vet Travel
Explains NDAA FY2019 policy allowing 100% P&T disabled veterans limited Space-A access on specific routes.
Read Details →Planning & Sign-Up
AMC Official Space-A Page
Central AMC resource: rules, tips, terminals, forms, FAQs.
Open AMC Page →AMC Form 140
Standard worldwide Space-A signup form accepted at passenger terminals.
Download Form 140 →Passenger Terminal Directory
Contact info, hours, and official social media for AMC terminals.
Browse Terminals →STEP Registration
Register overseas trips for embassy alerts & emergency support.
Register with STEP →Travel Execution
Passenger Bill of Rights
Outlines passenger protections for mission delays & changes.
View Document →Foreign Clearance Guide (FCG)
Passport, visa, and immunization requirements by destination.
Open FCG →Special Considerations
Documentation Requirements
IDs, orders, leave forms, and proof of eligibility for each traveler category (DoDI 4515.13 Enclosure 3).
Review Enclosure 3 →Eligible Travelers & Segments
Determines authorized travel pairings between CONUS, OCONUS, and U.S. territories (Table 3).
Open Table 3 →