Southwest Airlines (SWA) on-time performance, September 2026
110,280 scheduled Southwest Airlines departures in US airspace in September 2026, 71.8% of them on time. Measured from FAA departure data, updated every morning.
On time, day by day
Share of Southwest Airlines departures within 15 minutes of schedule, by day. Light bars show each day's departures for context. Worst day: Friday 4 September at 58.2%. Best: Wednesday 9 September at 85.2%.
Airports, ranked by on-time share
Airports with at least 30 Southwest Airlines departures in the month.
| Airport | Departures | On time | 45+ min late | Avg delay (min) |
|---|---|---|---|---|
| KOA Kona | 234 | 95.7% | 2.1% | -0.9 |
| ITO Hilo | 155 | 95.5% | 0.6% | 0.4 |
| HNL Honolulu | 984 | 92.8% | 2.4% | 0.7 |
| LIH Lihue | 228 | 89.0% | 5.7% | 4.1 |
| OGG Kahului | 414 | 88.6% | 1.7% | 1.5 |
| NAS Nassau | 30 | 86.7% | 6.7% | 2.3 |
| SDF Louisville | 426 | 86.6% | 5.4% | 3.0 |
| LBB Lubbock | 232 | 83.6% | 6.9% | 8.0 |
| MAF Midland | 282 | 82.3% | 6.7% | 8.9 |
| TYS Knoxville | 192 | 82.3% | 4.2% | 6.3 |
| MKE Milwaukee | 797 | 81.8% | 5.8% | 7.5 |
| LGB Long Beach | 1,035 | 81.7% | 6.5% | 6.0 |
| ICT Wichita | 149 | 81.2% | 6.0% | 5.0 |
| GEG Spokane | 311 | 80.7% | 4.8% | 7.4 |
| PVD Providence | 425 | 80.5% | 9.4% | 13.7 |
| VPS Valparaiso | 174 | 80.5% | 5.7% | 9.5 |
| MHT Manchester | 209 | 80.4% | 7.7% | 10.5 |
| GSP Greer | 125 | 80.0% | 11.2% | 11.0 |
| PNS Pensacola | 244 | 79.5% | 6.6% | 9.1 |
| LIT Little Rock | 209 | 79.4% | 5.7% | 6.7 |
| CVG Cincinnati | 242 | 79.3% | 5.4% | 5.4 |
| ISP Islip | 207 | 79.2% | 6.3% | 8.4 |
| MYR Myrtle Beach | 207 | 79.2% | 9.7% | 13.2 |
| SNA Santa Ana | 1,207 | 79.0% | 6.5% | 5.4 |
| OKC Oklahoma City | 592 | 78.7% | 8.8% | 9.7 |
| SJU San Juan | 290 | 78.6% | 7.2% | 13.7 |
| BUF Buffalo | 412 | 78.4% | 8.3% | 8.4 |
| IND Indianapolis | 933 | 78.3% | 6.3% | 12.0 |
| ROC Rochester | 179 | 78.2% | 10.1% | 15.1 |
| MSP Minneapolis | 489 | 77.7% | 7.6% | 10.9 |
| TUL Tulsa | 404 | 77.7% | 8.7% | 9.9 |
| AMA Amarillo | 158 | 77.2% | 7.6% | 8.2 |
| BUR Burbank | 1,430 | 77.0% | 9.1% | 8.0 |
| ELP El Paso | 704 | 76.7% | 8.5% | 10.8 |
| SAT San Antonio | 1,166 | 76.4% | 8.0% | 10.6 |
| SRQ Sarasota/Bradenton | 245 | 76.3% | 10.2% | 11.8 |
| PSP Palm Springs | 104 | 76.0% | 9.6% | 8.8 |
| TPA Tampa | 1,636 | 75.9% | 9.4% | 10.7 |
| TUS Tucson | 340 | 75.9% | 11.2% | 11.6 |
| HDN Hayden | 33 | 75.8% | 12.1% | 13.4 |
| FAT Fresno | 176 | 75.6% | 8.5% | 9.2 |
| HOU Houston | 4,016 | 75.5% | 9.6% | 9.1 |
| MCI Kansas City | 1,860 | 75.5% | 8.4% | 12.5 |
| CLE Cleveland | 457 | 75.5% | 6.6% | 8.6 |
| ALB Albany | 309 | 75.4% | 8.7% | 12.4 |
| ONT Ontario | 938 | 75.3% | 8.6% | 11.3 |
| KECP Panama City Beach | 300 | 75.3% | 9.3% | 10.2 |
| DSM Des Moines | 150 | 75.3% | 7.3% | 14.8 |
| ORF Norfolk | 281 | 75.1% | 7.8% | 11.4 |
| SMF Sacramento | 2,534 | 75.0% | 8.5% | 9.6 |
| OMA Omaha | 616 | 74.7% | 7.6% | 11.5 |
| DAL Dallas | 5,228 | 74.6% | 10.2% | 8.4 |
| RNO Reno | 755 | 74.6% | 9.3% | 10.0 |
| SBA Santa Barbara | 177 | 74.6% | 10.7% | 10.8 |
| CMH Columbus | 928 | 74.4% | 9.9% | 13.5 |
| RDU Raleigh-Durham | 612 | 74.3% | 9.8% | 11.4 |
| GRR Grand Rapids | 178 | 74.2% | 6.7% | 12.0 |
| ABQ Albuquerque | 877 | 74.0% | 9.9% | 13.5 |
| BOI Boise | 450 | 73.6% | 7.3% | 9.9 |
| MDW Chicago | 6,157 | 73.4% | 10.7% | 11.5 |
| BHM Birmingham | 386 | 73.3% | 8.8% | 10.1 |
| EUG Eugene | 176 | 72.7% | 9.1% | 12.2 |
| STL St. Louis | 3,075 | 72.4% | 11.3% | 14.0 |
| CHS Charleston | 283 | 72.4% | 8.1% | 11.2 |
| BWI Baltimore | 5,661 | 72.3% | 11.3% | 13.3 |
| PHX Phoenix | 4,752 | 72.3% | 9.3% | 11.1 |
| BDL Windsor Locks | 336 | 72.3% | 8.0% | 13.3 |
| PWM Portland | 180 | 72.2% | 12.2% | 13.6 |
| SJC San Jose | 2,127 | 72.0% | 11.6% | 11.7 |
| PIT Pittsburgh (Pennsylva) | 816 | 71.9% | 10.5% | 14.3 |
| LAS Las Vegas | 6,679 | 71.7% | 10.2% | 11.6 |
| DTW Detroit | 376 | 71.0% | 8.8% | 13.0 |
| STS Santa Rosa | 124 | 71.0% | 11.3% | 14.2 |
| PDX Portland | 811 | 70.7% | 9.5% | 12.1 |
| AUS Austin | 3,037 | 70.6% | 11.0% | 12.5 |
| CRP Corpus Christi | 88 | 70.5% | 4.5% | 9.3 |
| MSY New Orleans | 1,275 | 69.8% | 11.2% | 15.1 |
| MCO Orlando | 3,751 | 69.5% | 11.4% | 14.6 |
| OAK Oakland | 2,142 | 69.4% | 11.8% | 13.5 |
| JAX Jacksonville | 373 | 69.4% | 11.0% | 15.5 |
| SAV Savannah | 247 | 69.2% | 10.5% | 12.6 |
| JAN Jackson | 91 | 69.2% | 13.2% | 15.0 |
| PHL Philadelphia | 447 | 68.5% | 12.3% | 20.7 |
| COS Colorado Springs | 381 | 68.5% | 13.1% | 17.0 |
| FLL Fort Lauderdale | 716 | 68.3% | 14.5% | 17.6 |
| BNA Nashville | 5,298 | 67.5% | 10.9% | 13.9 |
| ATL Atlanta | 1,243 | 67.5% | 11.1% | 16.7 |
| MIA Miami | 370 | 67.0% | 17.8% | 20.0 |
| RSW Fort Myers | 422 | 66.4% | 12.6% | 18.5 |
| RIC Richmond | 165 | 66.1% | 12.1% | 15.7 |
| LAX Los Angeles | 2,079 | 65.7% | 13.4% | 16.1 |
| HRL Harlingen | 209 | 65.6% | 7.2% | 13.2 |
| DEN Denver | 7,049 | 65.4% | 12.7% | 16.4 |
| SLC Salt Lake City | 840 | 65.2% | 11.7% | 16.8 |
| DCA Washington | 1,321 | 64.8% | 15.4% | 18.1 |
| SAN San Diego | 3,468 | 64.6% | 15.4% | 14.6 |
| CLT Charlotte | 262 | 64.1% | 12.2% | 17.5 |
| BZN Bozeman | 211 | 61.1% | 10.4% | 17.8 |
| LGA New York | 928 | 54.3% | 21.1% | 25.4 |
| BOS Boston | 674 | 54.3% | 28.6% | 32.6 |
| SEA Seattle | 919 | 52.4% | 18.2% | 21.0 |
| MEM Memphis | 347 | 49.3% | 14.4% | 26.1 |
| SFO San Francisco | 933 | 48.4% | 29.9% | 30.0 |
| MTJ Montrose | 34 | 32.4% | 8.8% | 23.6 |
Least punctual routes
Routes with at least 20 Southwest Airlines departures, lowest on-time share first.
| Route | Flights | On time | Avg delay |
|---|---|---|---|
| SEA to DAL Seattle to Dallas | 30 | 10.0% | 34.2 |
| BOS to DAL Boston to Dallas | 30 | 13.3% | 81.0 |
| SFO to DAL San Francisco to Dallas | 30 | 16.7% | 58.9 |
| SEA to AUS Seattle to Austin | 30 | 23.3% | 31.0 |
| DEN to BOS Denver to Boston | 74 | 25.7% | 46.2 |
| SFO to STL San Francisco to St. Louis | 30 | 26.7% | 55.0 |
| AUS to LBB Austin to Lubbock | 28 | 28.6% | 41.8 |
| MEM to BNA Memphis to Nashville | 60 | 31.7% | 24.3 |
| SEA to LGB Seattle to Long Beach | 25 | 32.0% | 28.7 |
| SAV to MDW Savannah to Chicago | 28 | 32.1% | 30.6 |
Busiest routes
The ten routes Southwest Airlines flew most this month.
| Route | Flights | On time | Avg delay |
|---|---|---|---|
| HOU to DAL Houston to Dallas | 328 | 76.5% | 5.4 |
| DAL to HOU Dallas to Houston | 320 | 76.6% | 6.7 |
| SJC to SAN San Jose to San Diego | 319 | 50.5% | 22.3 |
| SAN to SMF San Diego to Sacramento | 313 | 61.3% | 14.6 |
| LAS to SAN Las Vegas to San Diego | 310 | 45.5% | 27.5 |
| SAN to SJC San Diego to San Jose | 309 | 63.8% | 13.4 |
| SMF to SAN Sacramento to San Diego | 306 | 54.6% | 23.0 |
| RNO to LAS Reno to Las Vegas | 298 | 70.8% | 13.9 |
| SAN to LAS San Diego to Las Vegas | 294 | 61.2% | 18.2 |
| SMF to LAS Sacramento to Las Vegas | 292 | 75.0% | 9.8 |
Other months for Southwest Airlines
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).