Southwest Airlines, Delta Air Lines, and American Airlines aircraft.
DANIEL SLIM/AFP/Getty
- The feds want to make sure you're not getting cheated out of your airline rewards.
- The Department of Transportation is investigating the rewards programs of four major US airlines.
- Secretary Pete Buttigieg said the probe would make sure customers were "getting the value that was promised to them."
The feds want to make sure airlines aren't short-changing their customers out of their hard-earned points.