A missed connection at a packed terminal can strand a traveler hundreds of miles from home. Parcels in the cargo hold sit stuck alongside the stranded passenger. A small set of major gateways ties much of the world's air network together, linking cities and moving freight between them. Airports around the world served an estimated 9.8 billion passengers in 2025, and each of those trips passed through terminals of finite size. The airports that absorb the heaviest flows influence what a journey costs, how long it takes, and whether it arrives on time. Knowing where travelers and goods concentrate helps explain the fares, delays, and route options people face with each booking.

Demand kept climbing in 2025 even as the room to serve it grew tighter. Jet fuel cost about 13% less than a year earlier, and cooling inflation gave households more purchasing power. Cheaper fuel and stronger budgets kept passengers flying through a volatile year. Supply struggled to match that appetite. Slot and infrastructure limits held back growth in some regions. Backlogs in aircraft deliveries left carriers waiting on new planes, and air navigation constraints imposed a ceiling of their own. Airspace closures and conflicts stretched flight times and raised expenses, forcing airlines to reroute and steering traffic toward alternative hubs. Large hubs in North America and Europe neared saturation. Justin Erbacci, director general of the industry body behind the list, argues that keeping pace with demand requires governments to make sustained investment in airports and the wider aviation system a priority.

ACI World, the global trade association for airports, released its preliminary 2025 rankings on April 14, 2026. As of January 2026, its 811 members operate more than 2,200 airports in more than 160 countries. The association ranks airports in four categories: total passengers, international passengers, air cargo, and aircraft movements. Its worldwide totals are estimates, and the group presents this release as a first look at the year's traffic. The full rankings, drawing on detailed data from more than 2,700 airports, were scheduled for July 2026. The April release cautioned that its early figures could differ by small margins from that final count. The release names the leading three airports in each category, plus a few other positions in the passenger standings. The 10 airports below come from all four categories. They include each category's leaders and do not make up a single top 10.

Illustration: Quartz

Hartsfield-Jackson Atlanta International Airport kept first place for total passenger traffic in 2025, handling 106.3 million passengers across the year. Its margin over Dubai International Airport, the closest challenger in the passenger count, came to 11.1 million people. Atlanta by itself accounted for about 1.1% of the estimated worldwide total, a large slice for a single airfield.

Domestic travel drives much of that volume. Atlanta belongs to a group of four U.S. airports inside the overall top 10, and people flying within the country make up between 80% and 95% of the flow at each of them. The rankings' compilers read the robust American showing as evidence of ongoing market strength. Even the low end of that range means at least four in five travelers at each of these airports are on domestic trips. Dubai International Airport, by contrast, sits atop the international category. The world's two busiest airports by headcount draw on different pools of demand.

Atlanta also finished second in aircraft movements, behind Chicago O'Hare International Airport and ahead of Dallas/Fort Worth. O'Hare records more takeoffs and landings, yet it misses the top three for people carried. Atlanta pairs heavy runway activity with the biggest crowd of any airport on Earth. The gap suggests that each takeoff or landing at Atlanta carries more people, on average, than one at O'Hare. No other airport claims a top-three spot on both lists.

Atlanta's 2025 throughput implies between about 85 million and 101 million domestic trips at the airport. Cross-border passengers numbered no more than about 21.3 million. London Heathrow and Incheon, which trail Dubai in the international standings, each move more cross-border passengers than Atlanta does. Atlanta's crown rests on the U.S. domestic market. Its standing hinges more on home-country flying than on the cross-border surge that drove much of the 2025 recovery.

Illustration: Quartz

Dubai International Airport handled 95.2 million passengers in 2025, holding on to second place worldwide for total traffic. Atlanta sits 11.1 million travelers ahead, while Tokyo Haneda trails Dubai by 3.5 million. The cushion behind Dubai measures about a third of the gap in front of it. Haneda also moved up into third this year, so the nearest pressure on Dubai comes from below.

Dubai also retained the top position for international passengers, ahead of London Heathrow in second and Incheon in third. All three kept the spots they held before, leaving the cross-border podium unchanged. No other airport appears in the leading three of both the overall and the international lists. Haneda, close behind Dubai on total volume, falls outside that trio.

International travel grew 5.9% from 2024 to reach 4.0 billion passengers in 2025, putting it 8.3% above its 2019 level. Demand for cross-border trips drove the global recovery, and Dubai stands at the head of that segment.

The 10 busiest international airports handle 17% of those passengers. A 17% slice of 4.0 billion works out to about 680 million cross-border travelers passing through 10 hubs, and Dubai carries more of them than any other. Cross-border traffic concentrates at its largest gateways at nearly double the share that total traffic shows, which magnifies the weight of the airport out front.

Atlanta, the only airport to move more people than Dubai in 2025, is missing from the international podium. The two hubs draw their volume from different kinds of journeys. Atlanta builds its lead on sheer scale, while Dubai earns its standing through travelers crossing borders. Erbacci credits the world's busiest hubs with supporting trade, tourism, and economic growth in their communities and regions. Cross-border travel outgrew air travel as a whole against both 2024 and 2019, which puts Dubai's volume in the segment with the most momentum.

Illustration: Quartz

Tokyo Haneda Airport climbed to third place for total passengers in 2025, serving 91.7 million travelers during the year. The result puts Haneda behind Atlanta and Dubai, two airports that kept the first and second spots they held the prior year.

Haneda trails Dubai by 3.5 million passengers, with Dubai's total reaching 95.2 million. The distance to the leader stretches more than four times as wide. Atlanta handled 106.3 million passengers, a cushion of 14.6 million over the Tokyo airport. Haneda's total equals about 96% of Dubai's and about 86% of Atlanta's. Dubai sits 11.1 million travelers behind Atlanta, so the gap between first and second dwarfs the gap between second and third.

Haneda advanced during a year of broad expansion. Global passenger traffic rose 3.6% over 2024 and finished 7.3% above its 2019 level. The 2025 order sorts airports within a market that has outgrown its 2019 size.

Haneda's traffic amounts to a little under 1% of all passenger journeys worldwide in 2025. Atlanta's total works out to just over 1% of global traffic, while Dubai's falls a little short of that mark. The 10 busiest airports for total passengers claim 9% of global traffic, leaving Haneda with about a tenth of that group's combined share. Atlanta, Dubai, and Haneda handled 293.2 million passengers between them. The three airports accounted for close to 3% of the world's passengers, about a third of the share held by the full top 10.

Asia-Pacific airports staged a strong rebound in 2025, and the association behind the standings credits it with reshaping the global order. Haneda's ascent lines up with the regional shift, though the release stops short of explaining what drove the Tokyo airport's progress. Among the three largest passenger airports, Haneda alone moved in 2025, which carries the Asia-Pacific recovery into the uppermost tier of the table.

Illustration: Quartz

Shanghai Pudong climbed from 10th to fifth in total passengers during 2025, a five-place gain that outpaced every other airport in the passenger top 10. Four airports now carry heavier passenger volumes than the Chinese gateway, with Atlanta, Dubai, and Tokyo Haneda filling the first three of those spots.

Recovering international traffic, looser visa policies, and broader connectivity powered the ascent, according to the release. Two of those three forces depend on people crossing borders. Easier visa rules lower a barrier for foreign visitors, and a revival in international traffic brings those visitors back in numbers. Broader connectivity points to more routes linking Pudong with other cities. Taken together, the explanations describe an airport whose growth rested on overseas demand. Visa $V +0.74% rules belong to governments, not airport operators. Part of Pudong's advance traces to a policy choice outside the terminal's control.

China's reopening returned Chinese travelers to the air and accelerated activity across Asia-Pacific and at the largest airports, a regional driver the release does not tie to Pudong by name. Even so, the airport rose in the same year and the same region where the rebound gathered strength. The release describes Asia-Pacific's resurgence as reshuffling the global airport order.

Pudong held second place in air cargo in 2025, trailing Hong Kong and finishing ahead of Anchorage. Hong Kong and Pudong kept the same freight positions they occupied a year earlier. No other airport the release names appears in both the passenger standings and the top three for cargo. The airport entered 2025 as an established freight hub and left it among the five busiest airports in the world for passengers as well. A single facility now carries heavy loads of both people and goods. Pudong sits at the center of the two flows that Justin Erbacci, the association's director general, credits with sustaining trade and tourism.

Illustration: Quartz

Guangzhou Baiyun returned to ninth place for total passengers in 2025, a climb of 48 spots from the 57th position it held in 2022. The industry body calls the move a rebound. The word casts the 2022 standing as a trough the airport has since left behind.

Guangzhou Baiyun closed the gap between 57th and ninth in three years. Fifty-six airports carried more travelers than it did in 2022. By 2025 it had overtaken enough of them to join a group that includes Atlanta, Dubai, Tokyo Haneda, and Shanghai Pudong, the other passenger top 10 members the 2025 list names.

China's reopening brought Chinese travelers back in 2025 and quickened growth across Asia-Pacific and at major hubs. Guangzhou Baiyun's ascent fits that regional pattern. The industry body's account stops short of naming the airport as a beneficiary, so the timing suggests a link without confirming one.

Guangzhou Baiyun now sits four places behind Shanghai Pudong, another airport that vaulted up the passenger table. Three of the five passenger top 10 slots the 2025 standings fill in belong to airports that advanced, and only Atlanta and Dubai held their ground.

Illustration: Quartz

London Heathrow held onto second place for international passengers in 2025, sitting between Dubai in first and Incheon in third.

Heathrow is the lone European airport the release names in any of its four categories. Every other airport it cites operates in the U.S., the Middle East, or Asia-Pacific, a spread that runs from Atlanta and Tokyo Haneda on passenger volume to Hong Kong and Anchorage on freight. Europe's presence among the named leaders rests on a single London hub.

The London airport earns its standing on cross-border traffic alone. It does not appear among the top three the release lists for total passengers, air cargo, or aircraft movements. Its position comes from a measure limited to travelers crossing borders, which a large domestic base cannot inflate. The U.S. giants atop the total passenger table draw much of their volume from home-market flyers. Heathrow competes on a different kind of demand.

The international podium stayed intact through 2025. Dubai, Heathrow, and Incheon each kept the spot it occupied a year earlier. Upheaval struck other lists. Shanghai Pudong vaulted into fifth for total passengers and Guangzhou Baiyun returned to the top 10, yet neither cracked the international top three. The Asia-Pacific recovery reshuffled the overall order without dislodging the established names in overseas travel.

Heathrow defended its runner-up slot in a year when the release describes Europe's major hubs as nearing saturation. Steady footing under those constraints points to a foreign clientele that remained firm as the year's growth tilted toward Asia-Pacific.

Illustration: Quartz

Incheon held third place among airports for international passengers in 2025, keeping the position it occupied in the prior standings. The airport earns its spot in this selection through cross-border travel alone. The release names it in no other category, neither among the top airports for total passengers nor in the cargo or aircraft movement standings.

Stability defined the upper tier of the international table. Dubai and London Heathrow also stayed put, so the top three closed the year in the same order they began it. No hub beneath Incheon gained enough foreign travelers to pass it, even as international demand powered the industry's recovery across 2025.

Incheon's steadiness stands out against the churn elsewhere in the standings. The release links the Asia-Pacific rebound to shifting positions across the global rankings, and several airports climbed the total passenger list during the year. The international podium resisted that reshuffle entirely, with all three occupants finishing where they started.

Holding third through a year of expanding overseas travel shows that no challenger's cross-border growth was large enough to erase Incheon's lead over the rest of the field.

Shortfall: this slide runs about 180 words, short of the 300-word minimum. The source gives Incheon only a retained third-place international rank, with no passenger count, no prior-year figure, and no airport-specific context. The global international totals, the top-10 share, airspace rerouting, and China's reopening already appear in the introduction or other slides, so adding them would repeat material or attach unsupported causes to Incheon.

Illustration: Quartz

Hong Kong held first place for air cargo in 2025, finishing ahead of Shanghai Pudong in second and Anchorage, which climbed into third. Freight alone earns the airport its spot here. Hong Kong appears in none of the other three categories' top-three lists, which belong to Atlanta, Dubai, Tokyo Haneda, London Heathrow, Incheon, Chicago O'Hare, and Dallas/Fort Worth. Hong Kong's nearest cargo rival has a broader profile. Shanghai Pudong also places high among passenger hubs, splitting its weight between people and goods. Hong Kong's presence in this selection rests on shipments.

Goods cluster at a few hubs to a degree travelers never match. The 10 leading cargo airports handle close to 26% of the world's air freight, a heavier concentration than any passenger or flight measure shows. Worldwide shipments reached an estimated 128.9 million metric tonnes. Applied to that total, the group's portion comes to about 33.5 million tonnes, or about one of every four tonnes flown anywhere. Hong Kong sits at the head of that circle. Such tight clustering means trouble at any one of these freight hubs reaches a far larger slice of global trade than a disruption at a single passenger gateway.

Strong e-commerce demand and reworked supply chains drove cargo growth in 2025, according to the release. Hong Kong stayed in front through a year in which those chains reorganized. Shippers redrawing their routes still sent enough goods through the airport to keep it ahead of every rival, a sign its freight role withstood the shift.

Hong Kong and Shanghai Pudong both kept their previous cargo positions, and only the third slot changed hands as Anchorage advanced. A steady first and second suggests freight leadership rests on firmer footing than the total-passenger standings, which Asia-Pacific's rebound reshuffled. With Hong Kong and Shanghai Pudong holding both top slots, the head of the freight table sits in the same region whose recovery reshaped traveler traffic.

Illustration: Quartz

Anchorage moved into third place for global air cargo in 2025, finishing behind Hong Kong and Shanghai Pudong. Both of those airports kept the first and second positions they held before. Anchorage's arrival marks the only change among the three leading cargo airports. Its gain means another gateway, unnamed in the rankings, fell out of third place as Anchorage rose.

Freight alone earns Anchorage a spot among the 2025 leaders. The airport misses the top three for total passengers, international passengers, and aircraft movements. Within this group of 10, only Hong Kong shares that cargo-only profile. Shanghai Pudong, by contrast, turns up in the passenger standings as well as the shipping list. Anchorage's prominence rests on the goods crossing its facilities, which sets it apart from passenger-driven hubs such as Atlanta, Dubai, and Tokyo Haneda.

Anchorage advanced in a year when worldwide cargo volumes held steady near record levels. A higher position in a stable market points to shipments shifting among airports, with Anchorage outpacing at least one rival that once stood above it. The release links those volumes to faster, restructured global supply chains. Reorganization of that kind can redistribute shipments among gateways, though the release ties Anchorage's gain to no specific cause.

Erbacci credits the busiest hubs with keeping goods moving and with supporting trade, tourism, and economic growth across their communities and regions. Anchorage's third-place cargo finish shows an airport can join the world's top airports on freight volume, without the passenger crowds behind most other entries in this group.

This slide runs about 253 words, short of the 300-word minimum. The source gives Anchorage only a third-place air cargo rank, with no tonnage, prior rank, or airport-specific context, and the global cargo figures already belong to the Hong Kong slide.

Illustration: Quartz

Chicago O'Hare International Airport handled more takeoffs and landings in 2025 than any other airport in the world, with Atlanta second and Dallas/Fort Worth third behind it.

O'Hare's title exposes a split between two measures of airport activity. Atlanta carries more travelers than any other hub yet trails O'Hare on runway traffic. Atlanta moves more people through fewer takeoffs and landings. On average, each Atlanta takeoff or landing serves more people than one at O'Hare. O'Hare's edge rests on frequency, and Atlanta's on how many people fill each movement. The heaviest schedule of departures and arrivals and the largest crowd at the gates belong to different airports. Winning one count guarantees nothing on the other.

Aircraft movements worldwide reached about 101.5 million in 2025, 2.3% above 2024 and 0.2% above 2019. Passenger traffic outpaced flights by 1.3 percentage points against 2024 and by 7.1 points against the 2019 baseline. Airlines carried many more people over six years while holding flight counts close to their 2019 level. The gap suggests fuller cabins or larger aircraft on the average departure. Runway activity has recovered at a slower pace than the crowds boarding the planes.

The 10 airports with the most movements account for 6.4% of the global total, a smaller slice than the top 10 for total passengers hold and about a quarter of the cargo leaders' concentration. Air traffic spreads across a wider field of airports than travelers or freight do. Of the four categories in the rankings, aircraft movements show the weakest pull toward the biggest hubs. Freight forms the tightest cluster, passengers sit in the middle, and flights form the loosest. O'Hare's own portion must sit below 6.4%. No single airfield dominates the world's flight map, however crowded its runways become. Even the world's busiest runway system handles a sliver of global air traffic.

Quartz