US Airports With the Most Flight Delays in September
Among the 22 busiest US airports, Boston (BOS) had the lowest on-time departure rate in September: 73.9% of flights left within 15 minutes of schedule, with an average departure delay of 21 min.
Ranked by the share of departures that left on time, over September 2025 (US DOT data).
- Airports ranked
- 136
- Period
- September 2025
- US on-time departures
- 83.4%
- Ranked by
- On-time departures
Major hubs
100,000+ departures a year
| # | Airport | On-time departures | Avg delay | Cancelled |
|---|---|---|---|---|
| 1 | Boston (BOS)Boston Logan Intl, MA · 11,597 departures · most delay from air traffic control and volume | 73.9% | 21 min | 1.4% |
| 2 | Dallas-Fort Worth (DFW)Dallas Fort Worth Intl, TX · 25,641 departures · most delay from airline issues | 77.5% | 18 min | 1.9% |
| 3 | Las Vegas (LAS)Harry Reid Intl, NV · 14,399 departures · most delay from air traffic control and volume | 77.7% | 15 min | 0.5% |
| 4 | Miami (MIA)Miami Intl, FL · 7,573 departures · most delay from airline issues | 77.7% | 17 min | 0.4% |
| 5 | Chicago (ORD)Chicago O'Hare Intl, IL · 28,867 departures · most delay from airline issues | 78.6% | 16 min | 0.4% |
| 6 | Washington (DCA)Ronald Reagan Washington National, DC · 11,822 departures · most delay from air traffic control and volume | 79.8% | 15 min | 0.8% |
| 7 | Denver (DEN)Denver Intl, CO · 26,548 departures · most delay from air traffic control and volume | 80.4% | 12 min | 0.1% |
| 8 | Phoenix (PHX)Phoenix Sky Harbor Intl, AZ · 13,772 departures · most delay from airline issues | 81.3% | 15 min | 1.1% |
| 9 | Nashville (BNA)Nashville Intl, TN · 8,686 departures · most delay from airline issues | 82.4% | 12 min | 0.2% |
| 10 | Charlotte (CLT)Charlotte Douglas Intl, NC · 15,192 departures · most delay from airline issues | 82.9% | 12 min | 0.4% |
| 11 | Seattle (SEA)Seattle–Tacoma Intl, WA · 14,552 departures · most delay from airline issues | 83.4% | 10 min | 0.3% |
| 12 | Newark (EWR)Newark Liberty Intl, NJ · 9,945 departures · most delay from air traffic control and volume | 83.9% | 14 min | 1.1% |
| 13 | San Francisco (SFO)San Francisco Intl, CA · 11,830 departures · most delay from airline issues | 84.4% | 11 min | 0.3% |
| 14 | Orlando (MCO)Orlando Intl, FL · 11,256 departures · most delay from airline issues | 84.4% | 11 min | 0.2% |
| 15 | New York (LGA)LaGuardia, NY · 11,388 departures · most delay from air traffic control and volume | 84.6% | 13 min | 0.9% |
| 16 | New York (JFK)John F. Kennedy Intl, NY · 8,567 departures · most delay from airline issues | 84.6% | 12 min | 0.7% |
| 17 | Los Angeles (LAX)Los Angeles Intl, CA · 15,262 departures · most delay from airline issues | 85.5% | 11 min | 0.3% |
| 18 | Minneapolis (MSP)Minneapolis–Saint Paul Intl Airport / Wold–Chamberlain Field, MN · 9,559 departures · most delay from airline issues | 85.9% | 9 min | 0.1% |
| 19 | Houston (IAH)George Bush Intercontinental, TX · 9,493 departures · most delay from airline issues | 85.9% | 11 min | 0.2% |
| 20 | Atlanta (ATL)Hartsfield Jackson Atlanta Intl, GA · 25,839 departures · most delay from airline issues | 86.7% | 8 min | 0.1% |
| 21 | Detroit (DTW)Detroit Metropolitan Wayne County, MI · 10,014 departures · most delay from airline issues | 88.0% | 9 min | 0.2% |
| 22 | Salt Lake City (SLC)Salt Lake City Intl, UT · 9,344 departures · most delay from airline issues | 88.7% | 8 min | 0.2% |
Mid-size airports
25,000 to 100,000 departures a year
| # | Airport | On-time departures | Avg delay | Cancelled |
|---|---|---|---|---|
| 1 | Dallas (DAL)Dallas Love Field, TX · 5,518 departures · most delay from air traffic control and volume | 78.7% | 12 min | 0.1% |
| 2 | Oakland (OAK)Oakland San Francisco Bay, CA · 2,714 departures · most delay from airline issues | 78.9% | 11 min | 0.3% |
| 3 | Fort Lauderdale (FLL)Fort Lauderdale Hollywood Intl, FL · 5,663 departures · most delay from airline issues | 79.0% | 16 min | 0.4% |
| 4 | San Diego (SAN)San Diego Intl, CA · 7,875 departures · most delay from airline issues | 79.2% | 16 min | 1.4% |
| 5 | West Palm Beach (PBI)Palm Beach Intl, FL · 1,818 departures · most delay from airline issues | 80.8% | 15 min | 0.4% |
| 6 | Philadelphia (PHL)Philadelphia Intl, PA · 8,225 departures · most delay from airline issues | 81.4% | 13 min | 0.5% |
| 7 | Chicago (MDW)Chicago Midway Intl, IL · 6,459 departures · most delay from airline issues | 81.9% | 10 min | 0.1% |
| 8 | Baltimore (BWI)Baltimore/Washington Intl Thurgood Marshall, MD · 7,968 departures · most delay from airline issues | 82.3% | 10 min | 0.2% |
| 9 | St Louis (STL)St. Louis Lambert Intl, MO · 5,321 departures · most delay from airline issues | 82.7% | 11 min | 0.3% |
| 10 | Santa Ana (SNA)John Wayne Orange County Intl, CA · 3,751 departures · most delay from airline issues | 83.4% | 11 min | 0.6% |
| 11 | Kansas City (MCI)Kansas City Intl, MO · 3,928 departures · most delay from airline issues | 83.7% | 11 min | 0.3% |
| 12 | Sacramento (SMF)Sacramento Intl, CA · 4,804 departures · most delay from airline issues | 84.0% | 10 min | 0.3% |
| 13 | Austin (AUS)Austin Bergstrom Intl, TX · 6,889 departures · most delay from airline issues | 84.4% | 12 min | 0.4% |
| 14 | San Jose (SJC)Norman Y. Mineta San Jose Intl, CA · 3,777 departures · most delay from airline issues | 84.5% | 9 min | 0.5% |
| 15 | Milwaukee (MKE)General Mitchell Intl, WI · 2,315 departures · most delay from airline issues | 84.6% | 11 min | 0.6% |
| 16 | Ontario (ONT)Ontario Intl, CA · 2,177 departures · most delay from airline issues | 84.9% | 13 min | 0.5% |
| 17 | Burbank (BUR)Hollywood Burbank/Bob Hope, CA · 2,496 departures · most delay from airline issues | 85.1% | 11 min | 0.6% |
| 18 | Houston (HOU)William P. Hobby, TX · 4,452 departures · most delay from airline issues | 85.2% | 8 min | 0.1% |
| 19 | Jacksonville (JAX)Jacksonville Intl, FL · 2,063 departures · most delay from airline issues | 85.3% | 12 min | 0.5% |
| 20 | Columbus (CMH)John Glenn Columbus Intl, OH · 3,726 departures · most delay from airline issues | 85.4% | 11 min | 0.5% |
| 21 | Raleigh/Durham (RDU)Raleigh-Durham Intl, NC · 4,484 departures · most delay from airline issues | 85.6% | 13 min | 0.5% |
| 22 | Indianapolis (IND)Indianapolis Intl, IN · 3,742 departures · most delay from airline issues | 85.9% | 10 min | 0.6% |
| 23 | New Orleans (MSY)Louis Armstrong New Orleans Intl, LA · 3,619 departures · most delay from airline issues | 86.4% | 11 min | 0.4% |
| 24 | San Antonio (SAT)San Antonio Intl, TX · 3,334 departures · most delay from airline issues | 86.4% | 11 min | 0.6% |
| 25 | Cincinnati / Covington (CVG)Cincinnati Northern Kentucky Intl, KY · 2,613 departures · most delay from airline issues | 86.4% | 10 min | 0.6% |
| 26 | Fort Myers (RSW)Southwest Florida Intl, FL · 1,847 departures · most delay from airline issues | 86.6% | 12 min | 0.2% |
| 27 | Tampa (TPA)Tampa Intl, FL · 5,502 departures · most delay from airline issues | 86.7% | 11 min | 0.2% |
| 28 | Pittsburgh (PIT)Pittsburgh Intl, PA · 3,672 departures · most delay from airline issues | 86.9% | 10 min | 0.7% |
| 29 | Cleveland (CLE)Cleveland Hopkins Intl, OH · 3,240 departures · most delay from airline issues | 87.0% | 12 min | 0.6% |
| 30 | Portland (PDX)Portland Intl, OR · 5,269 departures · most delay from airline issues | 87.2% | 8 min | 0.2% |
| 31 | Omaha (OMA)Eppley Airfield, NE · 1,955 departures · most delay from airline issues | 87.2% | 9 min | 0.6% |
| 32 | Dulles (IAD)Washington Dulles Intl, VA · 4,815 departures · most delay from airline issues | 88.8% | 9 min | 0.3% |
| 33 | Honolulu, Oahu (HNL)Daniel K. Inouye Intl, HI · 4,480 departures · most delay from airline issues | 91.0% | 7 min | 0.3% |
| 34 | Kahului (OGG)Kahului Intl, HI · 1,956 departures · most delay from airline issues | 91.4% | 5 min | 0.1% |
Smaller airports
5,000 to 25,000 departures a year
| # | Airport | On-time departures | Avg delay | Cancelled |
|---|---|---|---|---|
| 1 | Orlando (SFB)Orlando Sanford Intl, FL · 537 departures · most delay from airline issues | 79.9% | 15 min | 0.0% |
| 2 | Traverse City (TVC)Cherry Capital, MI · 452 departures · most delay from airline issues | 80.9% | 21 min | 0.2% |
| 3 | Jackson (JAC)Jackson Hole, WY · 669 departures · most delay from airline issues | 81.4% | 20 min | 0.6% |
| 4 | Santa Rosa (STS)Charles M. Schulz Sonoma County, CA · 484 departures · most delay from airline issues | 81.5% | 16 min | 0.6% |
| 5 | Fayetteville/Springdale/Rogers (XNA)Northwest Arkansas National, AR · 1,039 departures · most delay from airline issues | 81.9% | 16 min | 0.6% |
| 6 | Sioux Falls (FSD)Sioux Falls Rgnl, SD · 567 departures · most delay from airline issues | 81.9% | 16 min | 0.9% |
| 7 | Knoxville/Maryville (TYS)McGhee Tyson, TN · 1,097 departures · most delay from airline issues | 82.0% | 16 min | 0.6% |
| 8 | Santa Barbara (SBA)Santa Barbara Muni, CA · 671 departures · most delay from airline issues | 82.2% | 13 min | 0.6% |
| 9 | Burlington (BTV)Patrick Leahy Burlington Intl, VT · 565 departures · most delay from airline issues | 82.2% | 18 min | 0.3% |
| 10 | El Paso (ELP)El Paso Intl, TX · 1,301 departures · most delay from airline issues | 82.7% | 14 min | 0.8% |
| 11 | Savannah (SAV)Savannah Hilton Head Intl, GA · 1,553 departures · most delay from airline issues | 83.1% | 13 min | 0.8% |
| 12 | Huntsville (HSV)Huntsville Intl, AL · 779 departures · most delay from airline issues | 83.1% | 14 min | 0.5% |
| 13 | Chattanooga (CHA)Chattanooga Metropolitan Airport (Lovell Field), TN · 455 departures · most delay from airline issues | 83.6% | 15 min | 0.7% |
| 14 | Richmond (RIC)Richmond Intl, VA · 1,488 departures · most delay from airline issues | 83.8% | 12 min | 0.5% |
| 15 | Fort Wayne (FWA)Fort Wayne Intl, IN · 523 departures · most delay from airline issues | 83.8% | 12 min | 0.6% |
| 16 | Springfield (SGF)Springfield Branson National, MO · 799 departures · most delay from airline issues | 84.2% | 11 min | 0.1% |
| 17 | Pinellas Park (PIE)St. Petersburg Clearwater Intl, FL · 501 departures · most delay from airline issues | 84.2% | 10 min | 0.0% |
| 18 | Wichita (ICT)Wichita Dwight D. Eisenhower National, KS · 956 departures · most delay from airline issues | 84.3% | 12 min | 0.7% |
| 19 | Asheville (AVL)Asheville Rgnl, NC · 912 departures · most delay from airline issues | 84.4% | 14 min | 0.4% |
| 20 | Albuquerque (ABQ)Albuquerque Intl Sunport, NM · 2,049 departures · most delay from airline issues | 84.6% | 13 min | 0.5% |
| 21 | Amarillo (AMA)Rick Husband Amarillo Intl, TX · 415 departures · most delay from airline issues | 84.7% | 12 min | 0.7% |
| 22 | Colorado Springs (COS)City of Colorado Springs Muni, CO · 1,156 departures · most delay from airline issues | 84.8% | 11 min | 0.7% |
| 23 | Aspen (ASE)Aspen-Pitkin County Airport (Sardy Field), CO · 550 departures · most delay from airline issues | 84.9% | 15 min | 0.4% |
| 24 | Charleston (CHS)Charleston Intl, SC · 1,881 departures · most delay from airline issues | 85.1% | 11 min | 0.3% |
| 25 | Tucson (TUS)Tucson Intl, AZ · 1,371 departures · most delay from airline issues | 85.1% | 14 min | 1.1% |
| 26 | Palm Springs (PSP)Palm Springs Intl, CA · 805 departures · most delay from airline issues | 85.4% | 11 min | 0.5% |
| 27 | Lubbock (LBB)Lubbock Preston Smith Intl, TX · 561 departures · most delay from airline issues | 85.4% | 16 min | 0.9% |
| 28 | Peoria (PIA)General Wayne A. Downing Peoria Intl, IL · 425 departures · most delay from airline issues | 85.4% | 11 min | 0.2% |
| 29 | Buffalo (BUF)Buffalo Niagara Intl, NY · 1,682 departures · most delay from airline issues | 85.5% | 13 min | 0.5% |
| 30 | Myrtle Beach (MYR)Myrtle Beach Intl, SC · 1,284 departures · most delay from airline issues | 85.8% | 12 min | 0.9% |
| 31 | Little Rock (LIT)Bill & Hillary Clinton National Airport/Adams Field, AR · 1,058 departures · most delay from airline issues | 85.8% | 12 min | 0.7% |
| 32 | Bozeman (BZN)Bozeman Yellowstone Intl, MT · 1,081 departures · most delay from airline issues | 86.3% | 10 min | 0.3% |
| 33 | Wilmington (ILM)Wilmington Intl, NC · 698 departures · most delay from airline issues | 86.4% | 11 min | 1.1% |
| 34 | Cedar Rapids (CID)The Eastern Iowa, IA · 680 departures · most delay from airline issues | 86.5% | 12 min | 1.2% |
| 35 | Key West (EYW)Key West Intl, FL · 439 departures · most delay from airline issues | 86.5% | 12 min | 0.2% |
| 36 | Reno (RNO)Reno Tahoe Intl, NV · 1,655 departures · most delay from airline issues | 86.6% | 9 min | 0.8% |
| 37 | Rapid City (RAP)Rapid City Rgnl, SD · 496 departures · most delay from airline issues | 86.6% | 10 min | 0.4% |
| 38 | Providence/Warwick (PVD)Rhode Island T. F. Green Intl, RI · 1,318 departures · most delay from airline issues | 86.7% | 11 min | 0.5% |
| 39 | Boise (BOI)Boise Air Terminal/Gowen Field, ID · 1,924 departures · most delay from airline issues | 86.8% | 10 min | 0.4% |
| 40 | Fresno (FAT)Fresno Yosemite Intl, CA · 1,127 departures · most delay from airline issues | 86.8% | 12 min | 0.6% |
| 41 | Grand Rapids (GRR)Gerald R. Ford Intl, MI · 1,504 departures · most delay from airline issues | 86.9% | 12 min | 0.7% |
| 42 | South Bend (SBN)South Bend Intl, IN · 661 departures · most delay from airline issues | 86.9% | 12 min | 0.3% |
| 43 | Shreveport (SHV)Shreveport Rgnl, LA · 556 departures · most delay from airline issues | 86.9% | 17 min | 1.1% |
| 44 | Columbia (CAE)Columbia Metropolitan, SC · 492 departures · most delay from airline issues | 86.9% | 11 min | 0.8% |
| 45 | Oklahoma City (OKC)OKC Will Rogers World, OK · 1,946 departures · most delay from airline issues | 87.0% | 11 min | 0.6% |
| 46 | Redmond (RDM)Roberts Field, OR · 595 departures · most delay from airline issues | 87.0% | 7 min | 0.3% |
| 47 | Louisville (SDF)Louisville Muhammad Ali Intl, KY · 1,929 departures · most delay from airline issues | 87.2% | 12 min | 0.7% |
| 48 | Long Beach (LGB)Long Beach Intl, CA · 1,381 departures · most delay from airline issues | 87.2% | 8 min | 0.1% |
| 49 | Rochester (ROC)Frederick Douglass Greater Rochester Intl, NY · 811 departures · most delay from airline issues | 87.2% | 9 min | 0.5% |
| 50 | White Plains (HPN)Westchester County, NY · 837 departures · most delay from airline issues | 87.3% | 11 min | 0.5% |
| 51 | Eugene (EUG)Eugene, OR · 723 departures · most delay from airline issues | 87.4% | 8 min | 0.8% |
| 52 | Madison (MSN)Dane County Rgnl Truax Field, WI · 1,162 departures · most delay from airline issues | 87.5% | 15 min | 0.5% |
| 53 | Syracuse (SYR)Syracuse Hancock Intl, NY · 801 departures · most delay from airline issues | 87.5% | 11 min | 0.5% |
| 54 | Spokane (GEG)Spokane Intl, WA · 1,587 departures · most delay from airline issues | 87.6% | 9 min | 0.2% |
| 55 | Appleton (ATW)Appleton Intl, WI · 509 departures · most delay from airline issues | 87.6% | 8 min | 0.0% |
| 56 | Tulsa (TUL)Tulsa Intl, OK · 1,516 departures · most delay from airline issues | 87.6% | 10 min | 0.9% |
| 57 | Norfolk (ORF)Norfolk Intl, VA · 1,734 departures · most delay from airline issues | 87.7% | 10 min | 0.3% |
| 58 | Memphis (MEM)Memphis Intl, TN · 2,059 departures · most delay from airline issues | 87.9% | 9 min | 0.2% |
| 59 | Pensacola (PNS)Pensacola Intl, FL · 1,091 departures · most delay from airline issues | 87.9% | 16 min | 0.4% |
| 60 | Albany (ALB)Albany Intl, NY · 989 departures · most delay from airline issues | 87.9% | 10 min | 0.4% |
| 61 | Dayton (DAY)James M. Cox Dayton Intl, OH · 639 departures · most delay from airline issues | 87.9% | 12 min | 0.3% |
| 62 | Des Moines (DSM)Des Moines Intl, IA · 1,244 departures · most delay from airline issues | 88.0% | 9 min | 0.5% |
| 63 | Fargo (FAR)Hector Intl, ND · 576 departures · most delay from airline issues | 88.0% | 11 min | 0.5% |
| 64 | Hartford (BDL)Bradley Intl, CT · 1,804 departures · most delay from airline issues | 88.2% | 9 min | 0.2% |
| 65 | Portland (PWM)Portland Intl Jetport, ME · 1,202 departures · most delay from airline issues | 88.3% | 11 min | 0.6% |
| 66 | Lexington (LEX)Blue Grass, KY · 855 departures · most delay from airline issues | 88.4% | 10 min | 0.6% |
| 67 | Birmingham (BHM)Birmingham-Shuttlesworth Intl, AL · 1,375 departures · most delay from airline issues | 88.5% | 10 min | 0.2% |
| 68 | Panama City Beach (ECP)Northwest Florida Beaches Intl, FL · 713 departures · most delay from airline issues | 88.5% | 7 min | 0.4% |
| 69 | Midland (MAF)Midland Intl Air and Space Port, TX · 860 departures · most delay from airline issues | 88.8% | 9 min | 0.2% |
| 70 | Valparaiso (VPS)Destin-Fort Walton Beach, FL · 801 departures · most delay from airline issues | 89.2% | 13 min | 0.4% |
| 71 | Anchorage (ANC)Ted Stevens Anchorage Intl, AK · 1,726 departures · most delay from airline issues | 89.5% | 8 min | 0.3% |
| 72 | Greenville/Greer/Spartanburg (GSP)Greenville-Spartanburg Intl, SC · 1,148 departures · most delay from airline issues | 89.5% | 8 min | 0.5% |
| 73 | Manchester (MHT)Manchester-Boston Rgnl, NH · 535 departures · most delay from airline issues | 89.5% | 10 min | 0.6% |
| 74 | Sarasota/Bradenton (SRQ)Sarasota Bradenton Intl, FL · 859 departures · most delay from airline issues | 89.9% | 7 min | 0.1% |
| 75 | Jackson (JAN)Jackson-Medgar Wiley Evers Intl, MS · 533 departures · most delay from airline issues | 90.2% | 6 min | 0.6% |
| 76 | Greensboro (GSO)Piedmont Triad Intl, NC · 914 departures · most delay from airline issues | 90.9% | 12 min | 0.7% |
| 77 | Pasco (PSC)Tri Cities, WA · 488 departures · most delay from airline issues | 91.4% | 9 min | 0.0% |
| 78 | Lihue, Kauai (LIH)Lihue, HI · 1,228 departures · most delay from airline issues | 91.5% | 6 min | 0.5% |
| 79 | Kailua-Kona (KOA)Ellison Onizuka Kona Intl Airport at Keāhole, HI · 1,234 departures · most delay from airline issues | 93.1% | 6 min | 0.5% |
| 80 | Hilo (ITO)Hilo Intl, HI · 522 departures · most delay from airline issues | 94.4% | 3 min | 0.2% |
By month
Delays follow the seasons: summer storms and winter weather hit different airports. Pick a month:
Frequently asked
- What counts as an on-time departure?
- The US Department of Transportation counts a flight as on time when it leaves the gate less than 15 minutes after its scheduled departure time. Cancelled and diverted flights are not counted as on time.
- Which month has the most flight delays in the US?
- In the last 12 months of data, July was the worst month nationally, with 71.4% of departures on time, and September was the best at 83.5%.
- Why are airports grouped by size?
- A hub with 300,000 departures a year deals with very different congestion than a regional airport, so each airport is ranked against airports of a similar size. Airports with fewer than 5,000 departures a year are not ranked.
- Does a low ranking mean I should avoid an airport?
- Not necessarily. These are historical averages. Leaving early in the day, picking the most reliable flight on your route, and checking FAA delays before you go matter more than the airport alone.
Least delayed airports in September
See ranking →Most on-time flights on the busiest routes
See flights →Find the most reliable flight for your trip
Search flights →Historical averages, not a prediction. Source: US Department of Transportation, Bureau of Transportation Statistics on-time reports for US airlines that report to the DOT. ATIS Alerts is not affiliated with any airline or airport.