Peter Greenberg shares which Airports have the most expensive food and beverages.PHOTO: NEW YORK, NY - MARCH 23: Departing passengers purchase food at a Shake Shack restaurant on March 23, 2022 at the LaGuardia Airport in New York City. Shake Shack is a fast food restaurant that started in New York City in 2001. (Photo by Robert Nickelsberg/Getty Images)