DOT opens investigation into major airlines’ frequent flyer miles systems

The Department of Transportation is launching an investigation into major U.S. airlines’ rewards systems to ensure customers aren’t seeing their frequent flyer miles being devalued without notice.

Transportation Secretary Pete Buttigieg sent letters to the four major airlines — American Airlines, Delta Air Lines, Southwest Airlines, and United Airlines — ordering them to provide records and submit reports with detailed information about the workings of their rewards programs, practices, and policies. The DOT said the investigation will focus on how consumers participating in airline rewards programs are affected by the possible devaluation of earned rewards, hidden or dynamic pricing, extra fees, and reduced competition and choice.