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On May 28, the Federal Aviation Administration announced $523 million in Airport Infrastructure Grants topped by $70 million for 
Dallas/Fort Worth International Airport (DFW), $46.9 million for 
Charlotte Douglas International Airport (CLT), and $41.9 million for 
Miami International Airport (MIA). After the payout was released, multiple outlets echoed the announcement and clarified it was the program’s fifth and final installment.
Ten weeks later, on August 4, the FAA issued what was the genuinely final AIG round, worth $870 million. That included its single largest check, $289 million, which was worth more than four times the DFW award. The funding went to Los Angeles International Airport (LAX), with Denver (DEN) and Chicago O’Hare (ORD) also drawing similarly hefty awards.
The premise that three Sun Belt megahubs uniquely captured the program’s closing largesse doesn’t survive contact with the agency’s own later release. The real question is what the AIG program’s money actually tracks, and whether a genuine Sun Belt tilt exists somewhere else in the aviation system.
What The May Release Actually Contained
The May 28 announcement carried a headline of numbers that read: $70 million to DFW for runway rehabilitation, $46.9 million to Charlotte Douglas for apron expansion, $41.9 million to Miami for terminal reconstruction and fuel-farm work. Yet these ticket items were just a select few out of $523 million spread across 332 grants in 43 states, according to AASHTO Journal.
The FAA’s own press release, in the same list of airports receiving funding, named those three, while it also headlined $18.7 million to Syracuse Hancock International (SYR) in upstate New York for deicing-pad reconstruction. According to Airline Geeks, it also gave $18 million to Philadelphia International (PHL) for taxiway pavement work, hardly Sun Belt geography. US Transportation Secretary Sean P. Duffy remarked in the FAA announcement:
“Upgrading our runway infrastructure is part of our work to usher in the Golden Age of Transportation. American families deserve state-of-the-art runways and infrastructure that will make their travel experience safer, smoother, and more efficient.”
Those awards were an order of magnitude below DFW’s. At the same time, they were large enough financial investments that the agency chose to feature them alongside the Sun Belt trio in its own release instead of glossing over the decision. So now why did the FAA choose to award a $70 million grant for one airport as opposed to an $18 million for another one, since geography alone doesn’t sufficiently explain the rationale?
The Formula Behind The Numbers
AIG funding was created under the 2021 Infrastructure Investment and Jobs Act. It isn’t awarded solely at the FAA’s discretion project by project. The program runs through a hub-size-based allocation structure carried over from the broader Airport Improvement Program. AIP caps large-hub airports at up to 55% of a given funding pool, medium hubs at 15%, small hubs at 20%, along with guarantees to provide financial assistance for non-hub and non-primary airports as well.
In a July 5 press release, FAA Administrator Bryan Bedford remarked:
“The FAA is prioritizing improving our nation’s airports and ensuring we issue grants quickly and efficiently. This funding does more than just rebuild runways and taxiways, it modernizes the travel experience for American families, ensuring our airports are safe and ready for the future.”
The dollar figure a given airport can draw on is tied to its passenger-enplanement volume and hub classification, not the region it sits in. DFW, Charlotte, and Miami are all classified as large hubs with enplanement counts in the tens of millions. That puts them near the ceiling of what any single airport can draw from a discretionary funding selection round. A fact that predates this administration and the latest batch of awards.
How The Final Disparity Reared Its Head
On August 4, when the FAA announced 339 grants worth $870 million, the round was described as the program’s actual closing installment, bringing the five-year, $14.5 billion AIG program to its statutory end, as Construction Dive covered. The largest single award in that round wasn’t in the Sun Belt at all. It was the $289 million that went to LAX for a new terminal access road, more than four times what DFW received in May.
Denver International (DEN) drew $69.11 million and Chicago O’Hare $47.89 million for taxiway reconstruction. Both were larger than Charlotte’s $46.9 million, and both airports sit squarely outside any reasonable definition of the Sun Belt. Miami did draw a second large award, $50 million for terminal-roof reconstruction. That highlighted MIA’s momentum, but it was outsized by LAX, which was not joined by Sun Belt peers at the top of the list.
Smaller grants in the same round went to airports from Ohio and Alaska. Once the full record is in, the ‘Sun Belt megahub’ framing describes one stage out of at least eight rounds the FAA issued in 2026. Even within that one phase, it omits the northern awards the agency itself chose to spotlight.
The Real Sun Belt Story Is An Airline Decision, Not A Funding One
The real Sun Belt narrative belongs to American Airlines’ route network, not to the FAA. American has spent roughly a decade building its network strategy around DFW, Charlotte, Miami, and Phoenix. At the same time, it has deliberately avoided costly competition in New York and Los Angeles.
Early widebody retirements during the pandemic left American without the long-haul aircraft to compete seriously out of coastal gateways. That strategy shows up in this year’s schedules. American’s summer 2026 widebody additions cluster around DFW, with new long-haul routes to Athens and Zurich, and Charlotte gaining daily widebody service from Frankfurt and Munich.
In advance of the summer travel season and World Cup, DFW opened nine new gates. American’s Senior Vice President of DFW Operations Jim Moses gave these remarks in the press release:
“DFW is central to our global operation and the historic investments we are making to modernize and expand our terminal facilities in partnership with DFW Airport will continue to enhance the customer experience and make way for future growth. The opening of the new pier provides a preview of what customers can expect from the ongoing transformation at DFW, showcasing American’s Forever Forward mindset as we look to the future. The expansion also arrives just in time to serve our customers during what’s going to be a landmark summer.”
This is a documented, years-long airline network building plan with real winners and losers for regional connectivity. It is a separate phenomenon from, and doesn’t require, any tilt in federal infrastructure funding. American’s hub cities would post large enplanement numbers, and thus qualify for large-hub-tier AIG awards, regardless of any single grant round.
The Same Airports, Under A Different Administration
The formula-driven, hub-size nature of these awards isn’t new to 2026. Charlotte Douglas received a $43 million FAA grant in 2024. That was for an end-around taxiway intended to cut air-traffic delays. It was a similarly large award, for a similarly large hub, issued through the same underlying cost-share structure years before the current phase.
In 2024, US Transportation Secretary Pete Buttigieg announced $110 million in Bipartisan Infrastructure Law Funding at 71 Airports, saying:
“The Biden-Harris Administration is proud to support projects to increase safety and efficiency on taxiways and runways at over 70 airports across the country. This is another good step in a multi-billion dollar modernization we’re delivering through President Biden’s Bipartisan Infrastructure Law to make America’s aviation systems safer and more efficient.”
Meanwhile, FAA Associate Administrator for Airports Shannetta R. Griffin also commented:
“These grants help airports across the nation sustain and improve critical infrastructure to advance the safest, most efficient airport system in the world.”
That continuity across administrations is itself evidence against the idea that DFW, Charlotte, and Miami’s 2026 awards reflect a policy choice. Large hubs have drawn large discretionary and formula grants throughout the life of the Bipartisan Infrastructure Law. That law’s own allocation caps were written that way in 2021, long before this fiscal year’s rounds were announced.
What To Watch Now That The Program Has Closed
With the fifth and final AIG round disbursed in August, the $14.5 billion, five-year program authorized under the 2021 Infrastructure Law has run its course. Any further federal airport capital support will depend on a new appropriation or a reauthorization of the underlying framework. In July, Secretary Sean P. Duffy was quoted:
“What better way to celebrate America than investing in its future. We’re ushering in the Golden Age of Transportation and rebuilding our airport infrastructure is critical to making that vision a reality. Under President Trump’s leadership, we are building an aviation system worthy of our country’s incredible history.”
Because that framework ties award size to enplanements and hub classification, whichever hubs keep growing their passenger counts, a metric airlines control through their own network decisions, including American’s continued Sun Belt buildout at DFW and Charlotte, will keep qualifying for the largest slices of whatever comes next.
That makes the airlines’ hub strategy, not the FAA’s grant announcements, the thing actually worth tracking if the underlying concern is whether Sun Belt airports keep pulling ahead of the rest of the country’s aviation infrastructure.
