Consumer complaints against Frontier Airlines came in at a lower rate in June than any other month of 2017 so far, the U.S. Department of Transportation reported today.

The Denver-based carrier posted a rate of consumer complaints to the USDOT of 1.86 per 100,000 “enplanements,” or boarding passengers, according the agency’s latest monthly Air Travel Consumer Report.

That’s less than a quarter the complaint rate against Frontier in January — 7.87 per 100,000. Since then, the airline’s complaint…