The majority of America's busiest airports were built more than 50 years ago

Notes: Shading represents airports that were deemed "constrained even after all planned improvements are implemented " by the FAA in its FACT3: Airport Capacity Needs in the National Airspace System evaluation. The opening date for each airport is based on the original airport in that location, which may have been named something different or previously operated as a military base
Chart: Monday Morning EconomistSource: U.S. Bureau of Transportation Statistics & Federal Aviation Administration