Airports › St. Louis (STL) › August 2023
Airport month · August 2023
St Louis Lambert International in August 2023
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In August 2023, reporting carriers scheduled 5,506 domestic departures from St Louis Lambert International (STL). 76.4% left less than 15 minutes late and 76.6% reached their destination on time; 1.0% were cancelled.
Nationally that month, 76.7% of flights departed on time and 76.9% arrived on time, so STL departures were level with the national departure figure.
Flights arriving at STL that month were on time 76.6% of the time (5,505 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 50%, air carrier 30% and national aviation system 19%.
- On time 76.6%
- Arrived 15+ minutes late 22.3%
- Cancelled 1.0%
- Diverted 0.2%
August 2023 against a year earlier, the airport's year and the nation
| Measure | Aug 2023 | Year earlier | STL, 12 months to Jul 2026 | All reported flights, Aug 2023 |
|---|---|---|---|---|
| Departed on time | 76.4% | — | 74.1% | 76.7% |
| Arrived on time | 76.6% | — | 76.8% | 76.9% |
| Cancelled | 1.0% | — | 1.3% | 1.5% |
| Average departure delay (late minutes only) | 15.0 min | — | 17.6 min | 17.3 min |
| Scheduled departures a day | 184 | — | 174 | 20,100 |
| Scheduled departures | 5,506 | — | 63,318 | 602,987 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| WN Southwest Airlines | 3,406 | 62% | 74.0% | 7.6 min | 0.7% |
| AA American Airlines | 583 | 11% | 77.2% | 24.4 min | 0.3% |
| DL Delta Air Lines | 526 | 10% | 86.3% | 0.7 min | 1.3% |
| UA United Airlines | 273 | 5% | 81.0% | 5.5 min | 1.5% |
| MQ Envoy Air | 145 | 3% | 75.2% | 10.8 min | 0.7% |
| 9E Endeavor Air | 139 | 3% | 90.6% | -9.7 min | 2.9% |
| F9 Frontier Airlines | 121 | 2% | 68.6% | 22.9 min | 5.8% |
| YX Republic Airline | 113 | 2% | 89.4% | -7.9 min | 1.8% |
| AS Alaska Airlines | 89 | 2% | 89.9% | -6.1 min | 1.1% |
| NK Spirit Airlines | 52 | 1% | 55.8% | 43.6 min | 1.9% |
| OH PSA Airlines | 38 | 1% | 71.1% | 23.0 min | 0.0% |
| OO SkyWest Airlines | 21 | 0% | 81.0% | 0.5 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| STL–DEN | St. Louis to Denver | 391 | 71.9% | 14.3 min | 1.3% |
| STL–LGA | St. Louis to New York | 361 | 84.2% | 1.7 min | 1.9% |
| STL–ATL | St. Louis to Atlanta | 311 | 81.7% | 4.7 min | 0.6% |
| STL–ORD | St. Louis to Chicago | 242 | 82.2% | 6.7 min | 1.2% |
| STL–MDW | St. Louis to Chicago | 209 | 75.6% | 6.0 min | 1.4% |
| STL–LAS | St. Louis to Las Vegas | 205 | 65.9% | 15.1 min | 3.4% |
| STL–DCA | St. Louis to Washington | 201 | 73.6% | 13.1 min | 1.0% |
| STL–MCO | St. Louis to Orlando | 193 | 72.0% | 9.9 min | 1.6% |
| STL–DAL | St. Louis to Dallas | 178 | 79.2% | 0.8 min | 0.0% |
| STL–DTW | St. Louis to Detroit | 176 | 83.5% | 2.0 min | 1.7% |
| STL–MSP | St. Louis to Minneapolis | 176 | 83.0% | 4.1 min | 0.6% |
| STL–DFW | St. Louis to Dallas/Fort Worth | 172 | 77.9% | 25.0 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left STL on time in August 2023?
76.4% of 5,506 scheduled domestic departures left less than 15 minutes late, and 76.6% reached their destination on time. The national figures that month were 76.7% and 76.9%.
How does that compare with a year earlier?
August 2022 is outside the 36 months on file, or the airport had too few reported flights that month.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2023; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for STL · methodology · corrections.