The 5 Most Expensive Airport Expansion Projects Under Construction In 2026

As of 2026, several significant airport expansion projects are underway globally, representing substantial investment across multiple sectors. The United States accounts for two of the most expensive undertakings, while the Middle East is home to three major developments. These ambitious endeavors reflect a continued global demand for increased air travel capacity and improved passenger experiences. Precise cost figures remain undisclosed at this time; however, these projects represent considerable financial commitments by their respective governments and investors. Ongoing construction highlights the strategic importance airports hold within international commerce and tourism networks.