PRNewswire -- SkyWest, Inc. (Nasdaq: SKYW) reported a 10.3 percent decrease in revenue passenger miles (RPMs) for March, while available seat miles (ASMs) decreased 8.5 percent compared to the same period last year. The combined airlines generated 1.40 billion RPMs for the month, while ASMs decreased to 1.80 billion. Load factor was down 1.6 percentage points to 77.6 percent compared to 79.2 percent for the same period last year. Passenger boardings for March totaled 2,797,007 a 6.9 percent decrease from March 2008.