For travelers, especially frequent business flyers, nothing disrupts a schedule quite like an unexpected flight delay. As global air travel rebounds following the pandemic, airports across the United States and beyond have seen a surge in traffic — and, in many cases, surges in delays. Recent data from the Federal Aviation Administration (FAA) and the Bureau of Transportation Statistics (BTS) provides a revealing look at which airports are the biggest culprits for delayed departures and arrivals in 2025.

The Anatomy of Delay: What’s Behind the Trends?

Industry experts attribute the ongoing rise in delays to a multitude of factors. Weather disruptions, increasingly severe and unpredictable due to climate change, remain the number one cause. Thunderstorms, hurricanes, and winter storms have especially plagued East Coast and Midwest hubs.

But weather isn’t the only culprit. The resurgence of air travel has outpaced the pace at which airports have been able to hire and train staff, leading to ground crew shortages and longer turnaround times. Air traffic control delays and frequent technology glitches — as highlighted by the January 2023 FAA NOTAM system outage and more recent technical issues — continue to wreak havoc.

2025’s Most Delay-Prone Airports: The Latest Rankings

The FAA’s latest reporting period (January–August 2025) reveals the airports where travelers are most likely to get stuck waiting:

• Newark Liberty International (EWR): Once again tops the charts, with only 65% of flights departing on time. Proximity to New York City, combined with airspace congestion in the Northeast, exacerbates delays.
• Chicago O’Hare International (ORD): Ranks second, with an average on-time departure rate of 68%. O’Hare’s central location means traffic volume is perpetually high, and severe weather often disrupts schedules, especially during winter and spring.
• Dallas/Fort Worth International (DFW): Saw a spike in delays during summer 2025, driven by summer storms and construction projects, with 70% on-time departures.
• Denver International Airport (DEN): Cited for storm-related delays in the spring, as well as increased ground handling issues. On-time performance hovers around 72%.
• Miami International Airport (MIA): Summer thunderstorms and a record-breaking rise in international arrivals pushed delay rates higher, with only 73% of flights departing on schedule.

Other consistently challenging airports include LaGuardia (LGA), Orlando International (MCO), and San Francisco International (SFO), all of which have seen significant traffic surges and persistent staffing shortages in the first eight months of 2025.

Weather, Staffing, and Infrastructure: The Perfect Storm

According to a 2025 Airlines for America (A4A) report, U.S. airlines operated at 90% of pre-pandemic capacity in summer, but staffing levels have lagged behind. Ground handling crews, TSA officers, and air traffic controllers are all in high demand, with some airports reporting vacancy rates upwards of 12%.

Infrastructure upgrades, such as runway repairs and terminal expansions at cities like Dallas, Denver, and Atlanta, though critical for long-term growth, have contributed to near-term congestion and slow taxi times. At New York area airports, airspace modernization initiatives continue, yet the volume of flights frequently overwhelms controllers during peak hours.

Airline-Specific On-Time Performance: Who’s Leading in 2025?

While airport location and infrastructure are major contributors to delays, not all airlines operate equally. According to FlightAware and Cirium’s mid-2025 rankings:

• Delta Air Lines continues to lead legacy carriers for on-time arrivals and departures, with a rate above 81% despite operating at high capacity.
• Alaska Airlines and Hawaiian Airlines top the charts overall, consistently achieving on-time rates above 85%—thanks in part to less congested hubs and streamlined operations.
• Southwest Airlines and United Airlines both saw modest improvements in 2025 but continue to face headwinds at their busiest airports (Denver, Chicago, Houston).

Ultra-low-cost carriers, including Spirit and Frontier, have seen the steepest declines in punctuality, due to tight aircraft scheduling and minimal slack in their operations.

Proactive Tips for Travelers: Reducing Delay Risks

While some disruptions are unavoidable, savvy travelers can take steps to minimize risks:

• Book early flights: Morning departures are statistically less likely to be delayed, as aircraft and crews are already at the airport.
• Opt for non-stop flights: Reducing connections lowers the chance of cascading delays.
• Use flight-tracking tools: Apps like FlightAware, FlightRadar24, and airline inbound flight monitors can alert travelers early to potential issues.
• Track weather before your trip: Especially important at airports in storm-prone regions.
• Build in buffer time: For critical business or international connections, allow several hours’ flexibility.
• Pilot and crew slowdowns: Be aware of recently reported labor slowdowns at some carriers and check for advisories.

For business travel managers and organizations, utilizing premium airport lounges, fast-track security, and travel management services can further reduce trip disruptions for employees.

The Big Picture: Air Travel Trends for 2025 and Beyond

With U.S. air travel demand projected to remain strong through 2026 according to International Air Transport Association (IATA) forecasts, and with more severe climate patterns on the horizon, airport congestion and delay management will be ongoing challenges for the industry. Major carriers and airports continue to invest in new technology (such as more sophisticated scheduling and AI-powered resource allocation) to mitigate issues.

Nevertheless, the best solution for travelers remains awareness and preparation. Understanding which airports and carriers perform best — and planning accordingly — can make all the difference between a smooth trip and hours spent in terminal limbo.