New Orleans is 4.3 times larger than Baltimore.
Area: 212 km2 calculated
Population: 621,342 (2012)
Baltimore is the largest city in the U.S. state of Maryland and the 26th-most populous city in the country. It is located in the central area of the state along the tidal portion of the Patapsco River, an arm of the Chesapeake Bay. Wikipedia
Area: 903 km2 calculated
Population: 369,250 (2012)
Wikipedia