Worst Airports for Delays in 2026 (Data Analysis)

Not all airports are created equal when it comes to on-time performance. Some airports consistently produce more delays than others due to geography, weather patterns, air traffic congestion, and infrastructure limitations.

We analyzed FAA on-time performance data and FlightQueue delay tracking across hundreds of US airports to rank the 15 worst airports for delays heading into 2026. For each airport, we break down the delay rate, primary cause, worst months, and what you can do to minimize disruption.

How We Measured Delays

A flight is considered delayed when it arrives 15 or more minutes after its scheduled arrival time, which is the FAA standard. Our rankings factor in the overall delay rate (percentage of flights delayed), average delay length, and cancellation rate. We weighted recent data more heavily to capture current trends rather than historical patterns that may no longer apply.

Data sources include FAA Air Traffic Organization performance data, Bureau of Transportation Statistics on-time reporting, and real-time delay tracking from FlightQueue. The period analyzed covers the 12 months through February 2026.

The 15 Worst Airports for Delays

<table><thead><tr><th>Rank</th><th>Airport</th><th>Code</th><th>Delay Rate</th><th>Avg Delay</th><th>Primary Cause</th></tr></thead><tbody><tr><td>1</td><td>Newark Liberty</td><td>EWR</td><td>31.2%</td><td>62 min</td><td>Volume/ATC</td></tr><tr><td>2</td><td>San Francisco Int'l</td><td>SFO</td><td>28.7%</td><td>58 min</td><td>Fog/Weather</td></tr><tr><td>3</td><td>LaGuardia</td><td>LGA</td><td>27.9%</td><td>55 min</td><td>Volume/ATC</td></tr><tr><td>4</td><td>JFK Int'l</td><td>JFK</td><td>27.1%</td><td>61 min</td><td>Volume/ATC</td></tr><tr><td>5</td><td>Chicago O'Hare</td><td>ORD</td><td>26.4%</td><td>52 min</td><td>Weather</td></tr><tr><td>6</td><td>Fort Lauderdale</td><td>FLL</td><td>25.8%</td><td>48 min</td><td>Thunderstorms</td></tr><tr><td>7</td><td>Boston Logan</td><td>BOS</td><td>24.3%</td><td>47 min</td><td>Weather/Wind</td></tr><tr><td>8</td><td>Dallas/Fort Worth</td><td>DFW</td><td>23.7%</td><td>44 min</td><td>Thunderstorms</td></tr><tr><td>9</td><td>Chicago Midway</td><td>MDW</td><td>23.1%</td><td>43 min</td><td>Weather</td></tr><tr><td>10</td><td>Philadelphia Int'l</td><td>PHL</td><td>22.6%</td><td>46 min</td><td>Volume/Weather</td></tr><tr><td>11</td><td>Miami Int'l</td><td>MIA</td><td>22.0%</td><td>41 min</td><td>Thunderstorms</td></tr><tr><td>12</td><td>Denver Int'l</td><td>DEN</td><td>21.4%</td><td>39 min</td><td>Winter weather</td></tr><tr><td>13</td><td>Charlotte Douglas</td><td>CLT</td><td>20.8%</td><td>38 min</td><td>Volume/Hub ops</td></tr><tr><td>14</td><td>Reagan National</td><td>DCA</td><td>20.3%</td><td>40 min</td><td>ATC/Airspace</td></tr><tr><td>15</td><td>Houston Hobby</td><td>HOU</td><td>19.7%</td><td>36 min</td><td>Thunderstorms</td></tr></tbody></table>

1. Newark Liberty International (EWR) — 31.2% Delay Rate

Newark has been the worst airport for delays in the US for years, and 2026 is no exception. The airport handles enormous volume while sharing airspace with JFK and LaGuardia, creating a three-way bottleneck over the New York metropolitan area that the FAA calls the most congested airspace in the world.

<strong>Primary causes:</strong> Air traffic control congestion, volume exceeding runway capacity, and weather (especially summer thunderstorms and winter snow). <strong>Worst months:</strong> June through August (thunderstorms) and December through February (winter storms). <strong>Average delay:</strong> 62 minutes when delayed.

<strong>Tips:</strong> Book the earliest flight of the day, as delays cascade throughout the afternoon. Avoid connecting through EWR if possible. If you must use Newark, check <a href="/delays">FlightQueue live delays</a> before heading to the airport.

2. San Francisco International (SFO) — 28.7% Delay Rate

SFO has a unique problem: fog. The airport's parallel runways are close enough together that when fog rolls in (which happens frequently, especially from May through August), the airport must switch to single-runway operations, cutting capacity roughly in half.

<strong>Primary causes:</strong> Marine fog layer reducing visibility below instrument approach minimums, requiring single-runway operations. <strong>Worst months:</strong> June through August, when fog is most frequent, ironically during what should be peak summer travel season. <strong>Average delay:</strong> 58 minutes when delayed.

<strong>Tips:</strong> Book morning flights before the fog typically develops. Consider Oakland (OAK) or San Jose (SJC) as alternatives, as they are rarely affected by the same fog pattern. If connecting through SFO, build in extra connection time.

3. LaGuardia (LGA) — 27.9% Delay Rate

LaGuardia shares the congested New York airspace with JFK and Newark, but adds its own challenges: short runways that limit operations in certain weather conditions and a compact footprint that makes ground operations slower.

<strong>Primary causes:</strong> Shared airspace congestion, weather (thunderstorms in summer, snow and ice in winter), and runway limitations. <strong>Worst months:</strong> June through August and December through February. <strong>Average delay:</strong> 55 minutes when delayed.

<strong>Tips:</strong> Fly early morning whenever possible. For flights to cities also served by JFK or EWR, compare delay rates across all three airports before booking.

4-5. JFK International and Chicago O'Hare

<strong>JFK (27.1% delay rate):</strong> The third New York area airport on this list suffers from the same airspace congestion as EWR and LGA, compounded by heavy international traffic that adds complexity to sequencing arrivals and departures. International flights carry more fuel and are heavier, requiring longer runway spacing. Worst months are summer and winter. The 61-minute average delay is the second longest on our list.

<strong>Chicago O'Hare (26.4% delay rate):</strong> As the nation's second busiest airport and a massive hub for both United and American, ORD handles immense volume. Add Chicago's notoriously volatile weather, with thunderstorms in summer and blizzards in winter, and delays are frequent. The ongoing runway modernization has helped but has not solved the fundamental problem of too many flights in challenging weather. Worst months are June through August and December through February.

<strong>Tips for both:</strong> Build buffer time into connections. At ORD, avoid the late afternoon push between 3-6 PM when delays peak. At JFK, international departures in the evening cluster tightly, so expect ground delays during that window.

6-10. Fort Lauderdale, Boston, DFW, Midway, Philadelphia

<strong>Fort Lauderdale (25.8%):</strong> South Florida thunderstorms are the primary culprit. Summer afternoon storms are nearly daily from June through September, and they can shut down operations for 30-60 minutes at a time. FLL also has a single east-west runway pair that limits capacity recovery after weather delays.

<strong>Boston Logan (24.3%):</strong> Nor'easters, wind patterns that force single-runway operations, and proximity to the ocean create persistent weather challenges. Winter is the worst season, with ice, snow, and crosswinds. The airport's location on a harbor also means fog is a regular issue.

<strong>Dallas/Fort Worth (23.7%):</strong> Texas thunderstorms are powerful and frequent from April through September. DFW's size (7 runways) helps it recover quickly, but the storms can cause ground stops that cascade through the national system since DFW is a major connecting hub.

<strong>Chicago Midway (23.1%):</strong> Shares Chicago's weather challenges with ORD but has fewer runways and less room to recover. As Southwest's major hub, when Midway delays hit, they ripple through Southwest's national network.

<strong>Philadelphia (22.6%):</strong> A combination of volume, weather, and aging infrastructure. PHL's closely spaced parallel runways lose capacity in low-visibility conditions. East Coast weather patterns affect PHL frequently, and its position as an American Airlines hub means high traffic volume.

11-15. Miami, Denver, Charlotte, Reagan, Hobby

<strong>Miami International (22.0%):</strong> Similar to Fort Lauderdale, summer thunderstorms are the main issue. MIA's extensive international operations add complexity. Worst months: June through September.

<strong>Denver International (21.4%):</strong> Winter blizzards and spring snowstorms are the primary delay drivers. DEN's six runways handle volume well in clear weather, but Colorado storms can be severe and fast-moving. The airport's position as a United hub means delays cascade nationally. Worst months: November through March.

<strong>Charlotte Douglas (20.8%):</strong> As American Airlines' second largest hub by departures, CLT handles enormous volume relative to its size. Thunderstorms in summer and ice storms in winter add weather challenges. Hub operations create tight connection windows that are easily disrupted. Worst months: July and August.

<strong>Reagan National (20.3%):</strong> Restricted airspace around Washington DC and the Potomac River approach create unique air traffic control challenges. Limited runway capacity and political flight restrictions compound the issue. Worst months: summer thunderstorm season.

<strong>Houston Hobby (19.7%):</strong> Gulf Coast thunderstorms, particularly during the May through September storm season, drive most delays. Hobby's single-terminal operation and Southwest-heavy schedule mean disruptions affect a concentrated set of flights. Worst months: May through September.

Best Airports for On-Time Performance

For comparison, the airports with the best on-time records in 2026 tend to be mid-sized airports with favorable weather and manageable traffic volume. Honolulu (HNL), Salt Lake City (SLC), Portland (PDX), San Diego (SAN), and Minneapolis-St. Paul (MSP) consistently rank among the most reliable.

These airports share common traits: relatively stable weather patterns, adequate runway capacity for their traffic volume, and efficient hub operations. SLC in particular benefits from dry weather and a modern airport design optimized for quick turnarounds.

How to Use This Data When Booking Flights

Understanding delay patterns can help you make smarter booking decisions:

<strong>Choose connecting airports wisely.</strong> If you have a choice of connections, avoid routing through EWR, SFO, or LGA during their worst months. A connection through SLC or MSP may add flight time but dramatically reduces your risk of a missed connection.

<strong>Book early flights.</strong> At every airport on this list, the first departure of the day has the highest on-time rate. Delays build throughout the day as earlier disruptions cascade. A 6 AM flight is far less likely to be delayed than a 4 PM flight.

<strong>Avoid peak delay months.</strong> If your travel dates are flexible, shifting a trip by even a few weeks can make a significant difference. Flying through ORD in May instead of July, or through DEN in October instead of December, dramatically reduces your delay risk.

<strong>Monitor delays in real time.</strong> Check the <a href="/delays">FlightQueue delay report</a> before heading to the airport. If your departure airport is already experiencing delays, you can plan accordingly, arrive later, or proactively contact your airline about alternatives.

<strong>Build connection buffers.</strong> At any airport in the top 10 of this list, we recommend a minimum 90-minute connection time for domestic flights and 2.5 hours for international. The "minimum connection time" published by airlines is a best-case scenario, not a reliable plan.

The Bigger Picture: Are Delays Getting Worse?

The overall trend in US aviation delays has been mixed. Post-pandemic traffic has returned to record levels, but airline operational improvements and FAA modernization efforts have partially offset the increased volume. The on-time arrival rate for US airlines in the trailing 12 months sits at approximately 78.4%, compared to 79.1% in the same period of 2024.

The biggest factor in 2026 delay trends is weather volatility. Climate patterns have produced more frequent and intense thunderstorms in the Southeast and more variable winter storms in the Northeast and Midwest. These weather events are the single largest driver of delays at most airports on this list.

Airport infrastructure investments, including new runways at ORD and terminal improvements at EWR and LGA, are expected to improve capacity over the next several years. But in the near term, delays at the worst-performing airports are unlikely to improve significantly.

Stay informed with our <a href="/delays">live flight delay tracker</a>, which covers thousands of airports and updates throughout the day.