Airports › St. Louis (STL) › May 2024
Airport month · May 2024
St Louis Lambert International in May 2024
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 May 2024, reporting carriers scheduled 5,656 domestic departures from St Louis Lambert International (STL). 70.2% left less than 15 minutes late and 70.0% reached their destination on time; 0.9% were cancelled.
Nationally that month, 73.4% of flights departed on time and 72.3% arrived on time, so STL departures were 3.2 points below the national departure figure.
Flights arriving at STL that month were on time 72.6% of the time (5,658 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 50%, air carrier 26% and national aviation system 18%.
- On time 70.0%
- Arrived 15+ minutes late 28.8%
- Cancelled 0.9%
- Diverted 0.3%
May 2024 against a year earlier, the airport's year and the nation
| Measure | May 2024 | Year earlier | STL, 12 months to Jul 2026 | All reported flights, May 2024 |
|---|---|---|---|---|
| Departed on time | 70.2% | — | 74.1% | 73.4% |
| Arrived on time | 70.0% | — | 76.8% | 72.3% |
| Cancelled | 0.9% | — | 1.3% | 1.4% |
| Average departure delay (late minutes only) | 22.2 min | — | 17.6 min | 20.8 min |
| Scheduled departures a day | 189 | — | 174 | 20,325 |
| Scheduled departures | 5,656 | — | 63,318 | 609,743 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| WN Southwest Airlines | 3,463 | 61% | 67.9% | 15.3 min | 0.3% |
| AA American Airlines | 648 | 11% | 69.4% | 27.5 min | 3.1% |
| DL Delta Air Lines | 504 | 9% | 86.1% | 0.7 min | 0.0% |
| UA United Airlines | 242 | 4% | 60.3% | 30.8 min | 0.0% |
| YX Republic Airline | 197 | 3% | 79.7% | 13.2 min | 1.0% |
| MQ Envoy Air | 192 | 3% | 71.4% | 11.9 min | 2.6% |
| F9 Frontier Airlines | 129 | 2% | 72.1% | 29.0 min | 1.6% |
| 9E Endeavor Air | 99 | 2% | 76.8% | 0.3 min | 3.0% |
| AS Alaska Airlines | 78 | 1% | 65.4% | 13.1 min | 0.0% |
| OO SkyWest Airlines | 49 | 1% | 69.4% | 32.2 min | 8.2% |
| NK Spirit Airlines | 48 | 1% | 58.3% | 31.7 min | 2.1% |
| OH PSA Airlines | 7 | 0% | 71.4% | 5.7 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| STL–DEN | St. Louis to Denver | 348 | 65.5% | 24.3 min | 0.0% |
| STL–LGA | St. Louis to New York | 332 | 73.8% | 11.9 min | 1.5% |
| STL–ATL | St. Louis to Atlanta | 313 | 79.2% | 4.0 min | 0.0% |
| STL–ORD | St. Louis to Chicago | 245 | 71.8% | 29.7 min | 1.6% |
| STL–LAS | St. Louis to Las Vegas | 220 | 72.3% | 11.2 min | 0.0% |
| STL–PHX | St. Louis to Phoenix | 218 | 69.3% | 15.6 min | 0.0% |
| STL–MCO | St. Louis to Orlando | 209 | 73.2% | 14.1 min | 1.4% |
| STL–DFW | St. Louis to Dallas/Fort Worth | 203 | 63.1% | 21.3 min | 8.9% |
| STL–DCA | St. Louis to Washington | 195 | 71.3% | 14.7 min | 0.5% |
| STL–CLT | St. Louis to Charlotte | 184 | 60.3% | 28.0 min | 2.2% |
| STL–DAL | St. Louis to Dallas | 172 | 62.8% | 19.8 min | 4.1% |
| STL–MSP | St. Louis to Minneapolis | 171 | 80.1% | 6.5 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left STL on time in May 2024?
70.2% of 5,656 scheduled domestic departures left less than 15 minutes late, and 70.0% reached their destination on time. The national figures that month were 73.4% and 72.3%.
How does that compare with a year earlier?
May 2023 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 May 2024; 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.