The Department of Transportation’s inspector general said Monday that it is auditing Secretary Pete Buttigieg’s use of Federal Aviation Administration planes for conducting official trips.

The Washington Post reported that the out of 18 flights that Buttigieg has taken on FAA planes, only once was it less expensive to fly on the jets than it was to fly on a commercial flight.

“Glad this will be reviewed independently so misleading narratives can be put to rest,” Buttigieg claimed. “Bottom line: I mostly fly on commercial flights, in economy class. And when I do use our agency’s aircraft, it’s usually a situation where doing so saves taxpayer money.”

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