Atlanta vs. DFW in 2026: Atlanta's Lead Holds, and Chicago Is the Closer Rival

Atlanta is still the larger hub by a wide margin. Nothing in the latest figures suggests Dallas/Fort Worth will overtake it in 2026. The more useful signal is elsewhere: on scheduled seats in October 2026, Chicago O'Hare, not DFW, sat closest to Atlanta.

That reading comes from a Simple Flying analysis published October 20, 2026. It compiles Airports Council International (ACI) passenger counts and OAG airline schedule data. MileIntel did not collect or verify these figures independently.

The 2025 result was not close

According to ACI figures cited by Simple Flying, Hartsfield-Jackson Atlanta (ATL) handled 106,302,208 passengers in 2025. That made it the only airport in the world above 100 million for the year. Dallas/Fort Worth (DFW) recorded 85,660,127.

Both airports slipped compared with 2024. Atlanta fell 1.6% and DFW fell 2.5%. The decline moved DFW from third to fourth globally, behind Atlanta, Dubai and Tokyo Haneda.

Two measures, two different stories

The 2026 picture depends on which number you read:

• Footfall is the number of passengers an airport actually handled.
• Scheduled capacity is the number of seats airlines plan to fly. It shows what an airport could process in theory, not how many people actually boarded.

On footfall, Atlanta served 61.7 million travelers from January through July 2026. That was a marginal increase on the same period in 2025. DFW served 49.4 million, just over 1% fewer than a year earlier. July was the latest month with data available from all three of the busiest US airports.

On scheduled seats, Atlanta was flat year over year in October 2026, at 5.44 million, according to OAG data cited by Simple Flying. DFW grew 5% to 4.56 million.

So DFW is gaining on planned seats while still trailing on passengers actually counted. Atlanta remained ahead of it by hundreds of thousands of seats in October.

The faster mover is Chicago

O'Hare (ORD) is the hub that is closing in. It offered slightly over 5 million scheduled seats in October 2026, up 8%. That was enough to rank second globally and pass DFW for the month, at approximately 400,000 seats behind Atlanta.

O'Hare was also ahead of DFW on footfall through July 2026, with 51.3 million passengers, up more than 3%. Simple Flying expects Chicago to take second place from Dallas for the full year. That is a projection, not a reported result.

Why a traveler might care

Both hubs are dominated by a single airline. In 2025, Delta accounted for 78% of scheduled departing seats at Atlanta. American Airlines held 82% of DFW's scheduled capacity.

Our inference: For most travelers, choosing between these hubs is really choosing between Delta and American. Airport passenger rankings say little about your own trip. The airline whose schedule and network fit your route matters more than which airport tops a list.

DFW is also adding infrastructure. The airport's July 1, 2026 release listed the opening of nine new Terminal C gates among recent milestones. It describes these upgrades as part of a $12 billion capital plan called DFW Forward. The release also says DFW offers more than 270 nonstop destinations. Simple Flying notes that current investment at each airport will play a large part in whether a challenger eventually passes Atlanta.

Limits of this comparison

• October is one month of planned seats. It does not settle full-year passenger totals.
• Year-to-date passenger counts in these sources run only through July 2026.
• Airline capacity shares measure scheduled seats, not passengers carried or fares.
• Atlanta keeping its full-year lead is Simple Flying's expectation. Final 2026 totals were not available in the sources reviewed.