Delta Air Lines (DAL) on-time performance, September 2026
95,398 scheduled Delta Air Lines departures in US airspace in September 2026, 79.8% of them on time. Measured from FAA departure data, updated every morning.
On time, day by day
Share of Delta Air Lines departures within 15 minutes of schedule, by day. Light bars show each day's departures for context. Worst day: Friday 4 September at 67.9%. Best: Wednesday 30 September at 88.2%.
Airports, ranked by on-time share
Airports with at least 30 Delta Air Lines departures in the month.
| Airport | Departures | On time | 45+ min late | Avg delay (min) |
|---|---|---|---|---|
| PLS Providenciales | 32 | 100.0% | 0.0% | -8.8 |
| IDA Idaho Falls | 30 | 100.0% | 0.0% | -6.6 |
| FAR Fargo | 59 | 94.9% | 1.7% | 2.4 |
| YUL Montreal | 77 | 94.8% | 0.0% | -1.4 |
| LIH Lihue | 55 | 94.5% | 3.6% | -2.0 |
| OMA Omaha | 140 | 94.3% | 2.1% | -4.2 |
| LGB Long Beach | 63 | 93.7% | 3.2% | -0.2 |
| OGG Kahului | 92 | 93.5% | 5.4% | 5.5 |
| BTV Burlington | 31 | 93.5% | 3.2% | 2.1 |
| BIL Billings | 61 | 93.4% | 1.6% | -0.8 |
| YVR Vancouver | 91 | 92.3% | 4.4% | 6.2 |
| ROC Rochester | 116 | 92.2% | 6.0% | 3.7 |
| GEG Spokane | 231 | 91.8% | 4.3% | 1.3 |
| FSD Sioux Falls | 60 | 91.7% | 6.7% | 1.3 |
| PSC Pasco | 60 | 91.7% | 5.0% | 6.4 |
| TVC Traverse City | 34 | 91.2% | 2.9% | 10.9 |
| GRR Grand Rapids | 187 | 90.9% | 2.7% | -0.7 |
| BZN Bozeman | 165 | 90.9% | 3.6% | -0.2 |
| SJC San Jose | 303 | 90.8% | 4.3% | -0.2 |
| DSM Des Moines | 107 | 90.7% | 1.9% | -2.0 |
| GRB Green Bay | 54 | 90.7% | 3.7% | 0.6 |
| GSP Greer | 217 | 90.3% | 4.1% | 2.6 |
| ATW Appleton | 31 | 90.3% | 6.5% | 3.6 |
| TUS Tucson | 61 | 90.2% | 4.9% | 3.6 |
| TUL Tulsa | 130 | 90.0% | 6.9% | 5.2 |
| MUC Munich | 60 | 90.0% | 5.0% | -1.9 |
| KOA Kona | 60 | 90.0% | 3.3% | 0.6 |
| ROA Roanoke | 30 | 90.0% | 3.3% | -2.3 |
| ONT Ontario | 138 | 89.9% | 3.6% | 2.2 |
| ABQ Albuquerque | 115 | 89.6% | 6.1% | 7.4 |
| STL St. Louis | 466 | 89.5% | 5.4% | 2.1 |
| LHR London | 286 | 89.5% | 5.2% | 4.7 |
| AVL Asheville | 188 | 89.4% | 5.9% | 0.3 |
| OKC Oklahoma City | 139 | 89.2% | 5.0% | 0.8 |
| KECP Panama City Beach | 193 | 89.1% | 8.3% | 5.8 |
| MSN Madison | 136 | 89.0% | 5.1% | 2.9 |
| BOI Boise | 216 | 88.9% | 4.6% | 3.0 |
| FRA Frankfurt | 90 | 88.9% | 6.7% | 7.2 |
| ELP El Paso | 62 | 88.7% | 3.2% | 2.0 |
| ORF Norfolk | 286 | 88.5% | 7.0% | 7.5 |
| SDF Louisville | 234 | 88.5% | 6.0% | 2.2 |
| YYZ Toronto | 174 | 88.5% | 4.6% | 1.1 |
| MDW Chicago | 122 | 88.5% | 7.4% | -2.6 |
| PNS Pensacola | 222 | 87.8% | 7.2% | 4.7 |
| DAB Daytona Beach | 121 | 87.6% | 9.1% | 7.2 |
| FCA Kalispell | 121 | 87.6% | 3.3% | 3.9 |
| GSO Greensboro | 216 | 87.5% | 6.0% | 4.8 |
| NAS Nassau | 96 | 87.5% | 6.2% | 0.5 |
| BWI Baltimore | 443 | 87.4% | 6.8% | 1.1 |
| SMF Sacramento | 260 | 87.3% | 5.8% | 4.4 |
| PDX Portland | 621 | 87.1% | 3.9% | 2.2 |
| PIT Pittsburgh (Pennsylva) | 321 | 86.9% | 5.3% | 5.0 |
| CMH Columbus | 370 | 86.8% | 5.7% | 3.3 |
| GNV Gainesville | 143 | 86.7% | 5.6% | 1.0 |
| LIT Little Rock | 187 | 86.6% | 7.0% | 4.4 |
| IND Indianapolis | 402 | 86.3% | 4.7% | 5.1 |
| MCI Kansas City | 723 | 86.0% | 7.9% | 6.0 |
| LEX Lexington | 170 | 85.9% | 8.2% | 6.4 |
| RNO Reno | 92 | 85.9% | 4.3% | 2.9 |
| HPN White Plains | 56 | 85.7% | 10.7% | 5.6 |
| CPH Copenhagen | 42 | 85.7% | 4.8% | 5.7 |
| SJU San Juan | 207 | 85.5% | 5.8% | 7.2 |
| PWM Portland | 151 | 85.4% | 6.0% | 6.2 |
| BNA Nashville | 825 | 85.3% | 7.8% | 3.8 |
| ALB Albany | 116 | 85.3% | 5.2% | 4.2 |
| HNL Honolulu | 331 | 85.2% | 5.4% | 10.6 |
| PHX Phoenix | 810 | 85.1% | 6.3% | 4.7 |
| MAD Madrid | 87 | 85.1% | 11.5% | 12.9 |
| MKE Milwaukee | 333 | 85.0% | 6.3% | 3.7 |
| MLB Melbourne | 120 | 85.0% | 7.5% | 8.6 |
| YYC Calgary | 60 | 85.0% | 5.0% | 3.1 |
| ZRH Zurich | 60 | 85.0% | 5.0% | -0.0 |
| PVD Providence | 125 | 84.8% | 7.2% | 5.8 |
| JAN Jackson | 196 | 84.7% | 5.1% | 5.4 |
| ILM Wilmington | 111 | 84.7% | 8.1% | 3.8 |
| CLE Cleveland | 341 | 84.5% | 7.9% | 7.4 |
| DUB Dublin | 148 | 84.5% | 8.1% | 8.7 |
| CVG Cincinnati | 661 | 84.4% | 7.3% | 4.0 |
| ICT Wichita | 109 | 84.4% | 10.1% | 9.0 |
| COS Colorado Springs | 64 | 84.4% | 7.8% | 5.0 |
| SAV Savannah | 312 | 84.0% | 6.1% | 4.5 |
| BTR Baton Rouge | 94 | 84.0% | 8.5% | 14.8 |
| SAT San Antonio | 559 | 83.9% | 7.3% | 6.9 |
| OPO Porto | 31 | 83.9% | 9.7% | 7.5 |
| MSO Missoula | 86 | 83.7% | 10.5% | 17.7 |
| TRI Bristol/Johnson/Kingsport | 61 | 83.6% | 9.8% | 11.3 |
| LAS Las Vegas | 1,218 | 83.4% | 7.8% | 4.9 |
| SAN San Diego | 799 | 83.4% | 5.5% | 4.1 |
| EYW Key West | 120 | 83.3% | 5.0% | 4.4 |
| GPT Gulfport | 108 | 83.3% | 2.8% | 3.5 |
| ARN Stockholm | 30 | 83.3% | 10.0% | 3.4 |
| BIS Bismarck | 30 | 83.3% | 3.3% | 7.1 |
| CID Cedar Rapids | 30 | 83.3% | 0.0% | 6.0 |
| JNU Juneau | 30 | 83.3% | 0.0% | 4.7 |
| CLT Charlotte | 474 | 83.1% | 7.8% | 7.0 |
| BHM Birmingham | 327 | 82.9% | 8.3% | 7.7 |
| VPS Valparaiso | 199 | 82.9% | 7.5% | 7.1 |
| DEN Denver | 965 | 82.3% | 8.6% | 6.6 |
| AUS Austin | 1,101 | 82.2% | 9.1% | 9.9 |
| JAX Jacksonville | 421 | 82.2% | 8.6% | 10.3 |
| HOU Houston | 118 | 82.2% | 5.9% | -2.1 |
| DAY Dayton | 107 | 82.2% | 6.5% | 12.0 |
| TLH Tallahassee | 168 | 82.1% | 10.7% | 11.8 |
| XNA Fayetteville/Springdale/Rogers | 56 | 82.1% | 12.5% | 15.5 |
| MSP Minneapolis | 6,025 | 81.7% | 7.5% | 8.3 |
| IAH Houston | 676 | 81.7% | 9.2% | 9.8 |
| SNA Santa Ana | 333 | 81.7% | 9.9% | 8.7 |
| RIC Richmond | 230 | 81.7% | 10.9% | 13.9 |
| RDU Raleigh-Durham | 1,010 | 81.6% | 10.8% | 11.7 |
| SLC Salt Lake City | 4,718 | 81.5% | 6.8% | 7.7 |
| LAX Los Angeles | 3,382 | 81.4% | 8.2% | 7.4 |
| BDL Windsor Locks | 374 | 81.3% | 6.4% | 11.7 |
| ATH Athens | 133 | 81.2% | 6.0% | 6.3 |
| STT St. Thomas | 32 | 81.2% | 15.6% | 12.8 |
| SRQ Sarasota/Bradenton | 196 | 81.1% | 9.7% | 11.7 |
| DAL Dallas | 143 | 81.1% | 9.8% | 3.2 |
| CAE Colombia | 189 | 81.0% | 10.1% | 12.2 |
| HSV Huntsville | 189 | 81.0% | 11.1% | 10.0 |
| SYR Syracuse | 179 | 81.0% | 8.9% | 14.2 |
| JAC Jackson | 84 | 81.0% | 8.3% | 4.3 |
| MSY New Orleans | 519 | 80.7% | 10.2% | 13.3 |
| DFW Dallas-Fort Worth | 932 | 80.4% | 9.9% | 8.0 |
| MYR Myrtle Beach | 152 | 80.3% | 7.9% | 9.1 |
| DTW Detroit | 5,369 | 80.2% | 9.4% | 11.0 |
| ATL Atlanta | 22,093 | 80.1% | 8.6% | 9.9 |
| CHS Charleston | 372 | 80.1% | 8.3% | 9.4 |
| DCA Washington | 789 | 80.0% | 10.9% | 9.3 |
| BRU Brussels | 30 | 80.0% | 13.3% | 18.9 |
| MCO Orlando | 1,631 | 79.6% | 9.9% | 8.8 |
| MDT Harrisburg | 110 | 79.1% | 9.1% | 13.2 |
| BUR Burbank | 86 | 79.1% | 7.0% | 6.0 |
| MOB Mobile | 108 | 78.7% | 8.3% | 8.7 |
| NAP Naples | 46 | 78.3% | 10.9% | 8.7 |
| PHL Philadelphia | 559 | 78.2% | 13.8% | 13.5 |
| SGF Springfield | 64 | 78.1% | 4.7% | 9.4 |
| SEA Seattle | 3,046 | 77.8% | 8.7% | 10.2 |
| EWR Newark | 546 | 77.1% | 9.2% | 11.0 |
| RSW Fort Myers | 442 | 77.1% | 11.1% | 11.9 |
| TYS Knoxville | 157 | 77.1% | 12.7% | 10.9 |
| PRG Prague | 30 | 76.7% | 10.0% | 9.8 |
| IAD Washington | 342 | 76.3% | 11.7% | 7.6 |
| VCE Venice | 59 | 76.3% | 13.6% | 14.1 |
| EDI Edinburgh | 88 | 76.1% | 14.8% | 12.8 |
| CHA Chattanooga | 155 | 75.5% | 11.6% | 13.9 |
| BUF Buffalo | 174 | 75.3% | 9.8% | 11.7 |
| ANC Anchorage | 242 | 75.2% | 9.9% | 15.1 |
| TPA Tampa | 1,117 | 75.1% | 13.1% | 16.2 |
| MEM Memphis | 377 | 75.1% | 8.8% | 17.1 |
| FCO Rome | 225 | 74.2% | 13.8% | 12.8 |
| SFO San Francisco | 1,199 | 74.0% | 11.6% | 8.3 |
| AMS Amsterdam | 472 | 73.5% | 11.7% | 18.4 |
| KEF Keflavik | 60 | 73.3% | 16.7% | 13.5 |
| FLL Fort Lauderdale | 959 | 72.8% | 15.7% | 17.0 |
| NCE Nice | 73 | 72.6% | 16.4% | 35.0 |
| CDG Paris | 365 | 70.4% | 12.6% | 15.5 |
| ORD Chicago | 1,097 | 69.9% | 18.6% | 16.6 |
| JFK New York | 3,842 | 69.7% | 13.6% | 15.5 |
| LGA New York | 2,378 | 68.7% | 17.5% | 18.7 |
| MXP Milano | 94 | 68.1% | 16.0% | 22.0 |
| BOS Boston | 2,538 | 67.5% | 16.2% | 18.8 |
| MIA Miami | 883 | 67.3% | 20.6% | 28.5 |
| AGS Bush Field | 30 | 66.7% | 10.0% | 23.4 |
| FAI Fairbanks | 58 | 62.1% | 12.1% | 14.6 |
| LIS Lisbon | 58 | 60.3% | 24.1% | 25.5 |
| BCN Barcelona | 101 | 59.4% | 18.8% | 25.2 |
| ICN Seoul | 87 | 42.5% | 34.5% | 29.6 |
| HND Tokyo | 30 | 0.0% | 100.0% | 362.5 |
Least punctual routes
Routes with at least 20 Delta Air Lines departures, lowest on-time share first.
| Route | Flights | On time | Avg delay |
|---|---|---|---|
| HND to LAX Tokyo to Los Angeles | 29 | 0.0% | 351.5 |
| ICN to ATL Seoul to Atlanta | 30 | 3.3% | 70.2 |
| MSY to BOS New Orleans to Boston | 28 | 10.7% | 90.1 |
| KDJT to BOS to Boston | 29 | 17.2% | 55.1 |
| CHS to BOS Charleston to Boston | 27 | 18.5% | 51.6 |
| SAT to BOS San Antonio to Boston | 26 | 19.2% | 73.9 |
| LAS to BOS Las Vegas to Boston | 27 | 22.2% | 54.8 |
| ICN to MSP Seoul to Minneapolis | 20 | 25.0% | 39.8 |
| DEN to BOS Denver to Boston | 27 | 25.9% | 44.2 |
| MIA to BOS Miami to Boston | 50 | 30.0% | 60.7 |
Busiest routes
The ten routes Delta Air Lines flew most this month.
| Route | Flights | On time | Avg delay |
|---|---|---|---|
| ATL to MCO Atlanta to Orlando | 454 | 74.9% | 16.7 |
| MCO to ATL Orlando to Atlanta | 454 | 81.5% | 7.2 |
| ATL to LGA Atlanta to New York | 421 | 72.9% | 14.8 |
| LGA to ATL New York to Atlanta | 419 | 68.7% | 16.1 |
| ATL to TPA Atlanta to Tampa | 378 | 76.7% | 12.9 |
| TPA to ATL Tampa to Atlanta | 376 | 79.0% | 11.0 |
| ATL to FLL Atlanta to Fort Lauderdale | 367 | 80.4% | 11.6 |
| FLL to ATL Fort Lauderdale to Atlanta | 362 | 79.8% | 13.1 |
| BOS to ATL Boston to Atlanta | 343 | 71.1% | 17.4 |
| DTW to ATL Detroit to Atlanta | 341 | 80.9% | 9.8 |
Other months for Delta Air Lines
Airport pages for September 2026
How we measure
On time means the aircraft took off within 15 minutes of its scheduled departure, after subtracting the departure airport's normal taxi time (FAA SWIM reports wheels-off, not push-back, so the median taxi time of the last 30 days is taken off every flight first). Average delay is the mean of that taxi-adjusted delay over all departures; early departures count as negative minutes, so an operator that routinely leaves early can show a negative average. 45+ min late is the share of departures that left 45 minutes or more behind schedule, the point at which most connections are at risk.
Scope: scheduled airlines only, the same set as the monthly State of the Sky report (operators with published routes; private, fractional and charter operators are left out), so the two publications give the same numbers for the same month. Departures are counted by scheduled day (UTC). Each day's flights are rolled up overnight and published the next morning; the newest day keeps filling in for a day or two and is only shown once it is substantially complete. Figures can differ by a few tenths of a point from the State of the Sky report for the same month: that report is frozen on the 2nd of the following month, while these pages are rebuilt from the live rollup, which recomputes each airport's taxi baseline nightly and re-rolls the last week of the month as late departure times arrive (September 2026 at SFO: 16,398 departures in both, 69.2% on time here against 69.5% in the report).
Source: FAA System Wide Information Management (SWIM) flight plans and departure times, processed by PlaneTrack. Free to quote with credit to PlaneTrack (CC BY 4.0).