Norman, Oklahoma is 43% larger than Omaha, Nebraska.
Area: 491 km2 calculated
Norman is a U.S. city in Oklahoma 20 miles south of downtown Oklahoma City in its metropolitan area. Norman's 118,197 residents make it the third-largest city in Oklahoma by population, and the city serves as the county seat of Cleveland County. Wikipedia
Area: 342 km2 calculated
Omaha is the largest city in the state of Nebraska, United States, and is the county seat of Douglas County. It is located in the Midwestern United States on the Missouri River, about 10 miles north of the mouth of the Platte River. Wikipedia