Department of Transportation Office of Inspector General

Built World

Conducting ongoing audits of FAA's IIJA grant oversight

For five years, the largest airport-funding program in American history pumped roughly $3 billion a year into runways, terminals, and taxiways at more than 3,300 airports. That pipeline is now closing. In December 2025, the Federal Aviation Administration (FAA) released the fifth and final round of Airport Infrastructure Grant (AIG) formula allocations—$2.89 billion for fiscal year 2026—and opened the last competition for the Airport Terminal Program, worth approximately $1 billion. No successor program exists.

Updated Feb 20