Another month, another grim set of performance stats for Frontier Airlines.

For a second month, the Denver-based “ultra low cost carrier” remained in last place among 12 major carriers for on-time performance in August, according to Friday’s latest Air Travel Consumer Report from the U.S. Department of Transportation.

Frontier posted an on-time arrival rate of 65.9 percent for the month, versus the 12-airline average of 77.6 percent. The Denver carrier finished well behind Spirit Airlines’ second-to-worst on-time rate of 71.8 percent.

Frontier is the No. 3 carrier at Denver International Airport by passenger counts.

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