In 2024, migration statistics have forecasted large influxes of US residents moving to cities across the Sun Belt, specifically the country's southeastern part. As a result of the population boom, legacy infrastructure such as roads and housing have proven insufficient in managing the growing population. Because of this, both public and private investment in these cities has launched a considerable amount of new development, largely in transit networks such as airports and train stations. Once small to mid-size airports in the region are currently presenting new plans for expansion, renovation, and modernization.

Large southern cities currently lead the US in population increase. Texas and Florida metropolitan areas represent a hefty percentage of the population growth. However, cities such as Nashville, Charlotte, Atlanta, Greenville, and Raleigh are among the top 15 fastest movers. Low taxes, growing economies, and available properties have contributed to the growth. However, these regions also boast cities with diverse job markets. More people in these places lead to a growing demand for air transit and a refresher in the customer experience at each airport. Below are some of the recent developments in the Sun Belt.
Charlotte, North Carolina
In late February 2024, the US Secretary of Transportation Pete Buttigieg announced that the Charlotte International Airport (CLT) would receive $25 million in investment to improve "front of house" projects. This grant comes in addition to the over $161 million the airport received from the Infrastructure Investment and Jobs Act (IIJA) signed by President Biden in 2021.
The investment, used to spearhead Destination CLT, is part of the airport's new initiative to add more lounges and refurbish older gates. After recently adding new gates in 2021, the American Airlines regional hub has experienced more than 48 million travelers in 2022.

Nashville, Tennessee
The Nashville International Airport (BNA) recently reached the successful completion of BNA Vision, a multi-million-dollar renovation completed between 2017 and 2023. After its positive reception, the airport announced a follow-up program, New Horizon. New Horizon is expected to cost an additional USD 1.4 billion and will have an estimated completion date in late 2028.
The main focus of the new renovation is to create an international arrivals facility, which includes six international gates and a designated area for US Customs and Border Control. Airports like Chicago O'Hare International Airport (ORD) also have designated international terminals. According to reports, Nashville ranked as the eighth most popular US travel destination in 2023.
Raleigh, North Carolina
In 2015, the Raleigh-Durham International Airport (RDU) launched RDU Vision 2040, a 25-year plan to improve all aspects of the airport using public and private funds. Some of the already completed elements of the plan include roadwork upgrades, ground transportation improvements, and the completion of a new security checkpoint.

Although Raleigh might not have the same urban environment as the other Sun Belt cities, multiple research universities and large research facilities, commonly listed as the Research Triangle, have led to many international flights to the airport.
Atlanta, Georgia
The Hartsfield-Jackson Atlanta International Airport (ATL) is at a much different point in its lifecycle than the others mentioned in this list. ATL is the parent hub for Delta Air Lines, boasting the title of the busiest airport in the US. However big it might be, it has launched a recent renovation plan in ATLNext, a new development program set to complete a series of projects over the next 20 years. A couple of the plans include the creation of new parking decks and the creation of the Central Passenger Terminal Complex, a new hub that combines the spindles of the current ATL terminals.
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