The specification was a site within 45 minutes of an international airport with daily, direct flights to Seattle, San Francisco (Bay area), New York, and Washington DC.
That knocks out Nashville, Columbus, Indianapolis, Pittsburgh.
From North Bethesda MD (White Flint Mall) to BWI is 35+ miles, to Dulles is about 25 miles. BWI is probably outside the 45 minute mark. Other than the demolished White Flint Mall site there are no large tracts of land near or adjacent to Metro in Montgomery County.
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Looking at Dallas, the only universities of note are TCU and SMU. The U of Texas schools in/near Dallas are not the top tierr schools in the Univ of Texas system.