Wichita, Kansas is 2.8 times larger than Pittsburgh.
Area: 153 km2 calculated
Pittsburgh is the seat of Allegheny County and with a population of 305,841 is the second-largest city in the U.S. state of Pennsylvania. With a metropolitan CSA population of 2,659,937, it is the largest in both the Ohio Valley and Appalachia and the 20th-largest in the U.S. Wikipedia
Area: 430 km2 calculated
Wichita WICH-ə-taw is the largest city in the U.S. state of Kansas and the 49th-largest city in the United States. Located in south-central Kansas on the Arkansas River, Wichita is the county seat of Sedgwick County and the principal city of the Wichita metropolitan area. Wikipedia