U.S. Airports With the Most Summer Flight Delays in 2025

As the 2025 summer travel season unfolds, fresh data from flight tracking services, passenger rights firms and federal statistics highlights a familiar headache for U.S. travelers: chronic delays clustered around a handful of major airports.

Chicago and Newark Lead a Difficult Summer for Major Hubs

Recent analyses of 2025 operations indicate that several of the country’s largest hubs are again topping the charts for summer delays. A report drawing on AirHelp’s disruption data and independent coverage from outlets such as AFAR points to Chicago O’Hare International Airport and Newark Liberty International Airport as among the most delay-prone major U.S. gateways so far this year.

Chicago O’Hare has emerged as a particular hotspot, with reporting on the AirHelp dataset indicating that roughly 28 percent of flights there experienced delays in 2025, the highest delay share among large U.S. airports reviewed. Newark shows an even higher overall disruption burden when cancellations are factored in, with coverage noting that more than a quarter of flights were delayed and nearly 3 percent canceled, giving passengers in the New York–New Jersey region some of the least predictable summer schedules in the country.

Publicly available data from the Bureau of Transportation Statistics supports the picture of strain at these large hubs, which combine heavy traffic volumes, complex runway layouts and exposure to convective summer storms. Analysts note that even modest weather disruptions in the upper Midwest and Northeast can ripple quickly through tightly scheduled banks of flights, producing rolling delays that stretch into the evening peak.

For travelers, that means itineraries touching Chicago O’Hare or Newark during the core summer months of June through August are statistically more vulnerable to late departures or missed connections than those routed through many Western or midcontinent airports. Travel planners advise building longer layovers when connecting through these hubs and favoring early-morning departures, which data shows are less affected by downstream knock-on delays.

Sun-Belt Gateways See Heavy Seasonal Pressure

Beyond the big northern hubs, several warm-weather airports that serve as gateways to beaches and theme parks are also posting high delay rates in 2025. An aggregation of BTS on-time statistics and third-party analyses reviewed by Forbes Advisor and AirAdvisor indicates that Orlando International, Miami International and other Florida airports continue to experience some of the country’s most persistent summer scheduling challenges.

These airports combine sharp seasonal demand spikes with frequent thunderstorms and a high density of short-haul domestic flights, a mix that can magnify small operational issues into prolonged ground holds. Analysts reviewing 2021 to 2025 data for the 100 busiest U.S. airports found that some Florida hubs recorded among the highest shares of delays attributed to weather and airport operations, placing them near the top of “worst for summer travel” rankings.

In the Desert Southwest, large hubs such as Phoenix Sky Harbor and Las Vegas Harry Reid International have also appeared in 2025 delay league tables compiled from federal and commercial datasets. While their overall on-time performance often remains better than the most challenged East Coast airports, sustained afternoon heat, capacity constraints and fast-growing passenger numbers have driven up the average minutes of delay per flight in peak months.

Industry observers point out that these patterns mirror broader shifts in U.S. travel behavior. The post-pandemic surge in leisure demand has concentrated traffic into summer and holiday peaks at vacation-centric airports, outpacing infrastructure upgrades in terminals and on the airfield. As a result, travelers heading to beaches, cruises or major resort cities in 2025 often face similar delay risks to those connecting through traditional business hubs.

Smaller Airports Also Struggle With Chronic Delays

The latest rankings do not only implicate the country’s largest airports. A 2025 data study published by AirAdvisor, which examined performance between May 2024 and May 2025, highlights a cluster of midsize and regional airports with notably poor on-time records. These facilities may see fewer total flights, but a high proportion of those services arrive or depart late.

In several cases, smaller airports function as spokes in larger hub-and-spoke networks, meaning they inherit delays from congested hubs while lacking the staffing, gate capacity or runway flexibility to recover quickly. When a late-arriving aircraft is coded as the primary cause of delay, subsequent departures from that outstation are often pushed back, especially when aircraft and crew are tightly scheduled.

Analysts reviewing the AirAdvisor rankings describe a pattern of “chronic delay rates” that can exceed those at some larger hubs, particularly for late-afternoon departures in summer. Passengers using these secondary airports may be surprised to find that their local field appears high on national delay lists despite relatively modest passenger numbers.

Experts suggest that travelers departing from smaller airports in 2025 should pay close attention to the performance of the specific routes and airlines they use, rather than assuming that a quieter terminal automatically translates into a smoother operational experience.

What the 2025 Data Shows About Causes of Summer Delays

Behind the airport rankings, the 2025 data also sheds light on why delays are proving so stubborn. BTS cause-of-delay statistics and multi-year analyses reviewed by news outlets and data-focused commentators highlight that carrier-controlled factors and late-arriving aircraft remain the dominant drivers, even as weather retains a visible role in certain regions and seasons.

Several independent breakdowns of millions of U.S. flights between 2020 and 2025 show that while the share of delay time officially attributed to airlines has edged down, the total number of delayed operations and the average minutes lost per disrupted flight have risen. That suggests airlines have adjusted schedules and buffers but continue to operate networks that run close to capacity during busy summer periods, leaving limited room to recover from disruptions.

Airport-specific conditions then shape how those system-wide pressures play out. At heavily delayed hubs such as Chicago O’Hare and Newark, congested airspace, closely spaced runways and tight separation standards can compound thunderstorms or low clouds into hours of ground stops and flow restrictions. At Florida and Gulf Coast airports, frequent convective weather produces regular short suspensions of ramp activity that quickly cascade through packed departure banks.

Operational experts also point to staffing and infrastructure constraints, including air traffic control staffing in key sectors of the Northeast corridor, as a continuing vulnerability in 2025. While federal initiatives and airport capital projects are gradually adding capacity, most published assessments agree that the improvements are arriving more slowly than passenger demand is growing.

How Travelers Can Navigate the Worst-Performing Airports

For passengers planning summer trips in 2025, the new delay rankings serve less as a reason to avoid entire regions and more as a guide to smarter routing. Travel analysts reviewing the latest data advise prioritizing early departures from the most delay-prone airports, as morning flights are less likely to be affected by accumulated disruptions.

Where possible, passengers connecting through chronically delayed hubs such as Chicago O’Hare and Newark are encouraged to book longer layovers, particularly for international connections that may be harder to rebook. Selecting itineraries that route through more reliable midcontinent hubs can also reduce exposure to weather-sensitive coastal airspace during the stormiest summer weeks.

Consumer advocates note that passengers should familiarize themselves with airline delay and cancellation policies, as well as federal rules on refunds when flights are significantly changed. Several recent reports emphasize that tools provided by the Department of Transportation and independent passenger rights firms can help travelers understand whether they are entitled to rebooking assistance, meal vouchers or monetary compensation when delays stretch into hours.

Ultimately, the 2025 data underscores that while delays are increasingly concentrated at a subset of airports, disruption has become an embedded feature of peak-season U.S. air travel. Travelers who account for that reality when choosing routes, connection times and departure windows are better positioned to navigate a summer shaped by crowded skies and strained airport infrastructure.