Out Transportation Secretary Pete Buttigieg has launched a Department of Transportation (DOT) inquiry into the frequent flier rewards programs of the four largest U.S. airlines: American Airlines, Delta Air Lines, Southwest Airlines, and United Airlines.The inquiry has asked the airlines for detailed information so that the DOT can examine how participating consumers are impacted by the devaluation of earned rewards, hidden or dynamic pricing, extra fees, and reduced competition and choice, the DOT wrote in a statement. Related 10 times Pete Buttigieg proved he is a great Transportation Secretary Petes tenure has been marked by significant achievements and innovative leadership. While the DOT is investigating and can take action against airlines for unfair or deceptive business practices, the DOT hasnt accused any of the aforementioned airlines of such dealings. Stay connected to your community Connect with the issues and events that impact your community at home and beyond by subscribing to our newsletter. Subscribe to our Newsletter today Points systems like frequent flyer miles and credit card rewards have become such a meaningful part of our economy that many Americans view their rewards points balances as part of their savings. These programs bring real value to consumers, with families often counting on airline rewards to fund a vacation or to pay for a trip to visit loved ones, Buttigieg said. But unlike a traditional savings account, these rewards are controlled by a company that can unilaterally change their value. Our goal is to ensure consumers are getting the value that was promised to them, which means validating that these programs are transparent and fair.Airline rewards programs typically reward customers who frequently use a particular airline or make purchases with an airline-branded credit card. These earned miles or points can typically be redeemed for free or discounted travel, upgrades, airport lounge access or third-party goods and services.The problem with such programs is that airlines can impose new restrictions, like blackout and expiration dates, additional purchase requirements, and other limitations on who can redeem the rewards, how and when. Airlines can also devalue the rewards systems essentially requiring consumers to pay more or receive less for their earned benefits or also tack on extra fees for redeeming them. Similar changes can also affect many consumers when airlines merge, causing two different rewards programs to combine into a single new system. As part of the DOTs inquiry, it has asked airlines to describe any changes to its rewards programs over the last six years, the average dollar value of each programs accrued points or miles, and a side-by-side comparison of any customer fees compared to business costs that the airlines use the fees to cover.This isnt the first time that the DOT has examined airline practices under Buttigieg. In April, the DOT began requiring airlines to disclose extra costs for baggage, canceling tickets as well as for canceled or severely delayed flights. Last December, the DOT) secured enforceable commitments from the 10 largest U.S. airlines to cover travelers expenses for things like rebooking, meals and other costs connected to flight delays and cancellations.In November 2022, the DOT required six airlines to pay $600 million in refunds to hundreds of thousands of customers who had been denied them.