Airports › St. Louis (STL) › December 2023
Airport month · December 2023
St Louis Lambert International in December 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 December 2023, reporting carriers scheduled 5,270 domestic departures from St Louis Lambert International (STL). 79.9% left less than 15 minutes late and 81.8% reached their destination on time; 0.4% were cancelled.
Nationally that month, 83.1% of flights departed on time and 83.8% arrived on time, so STL departures were 3.2 points below the national departure figure.
Flights arriving at STL that month were on time 83.1% of the time (5,270 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 48%, air carrier 34% and national aviation system 17%.
- On time 81.8%
- Arrived 15+ minutes late 17.7%
- Cancelled 0.4%
- Diverted 0.1%
December 2023 against a year earlier, the airport's year and the nation
| Measure | Dec 2023 | Year earlier | STL, 12 months to Jul 2026 | All reported flights, Dec 2023 |
|---|---|---|---|---|
| Departed on time | 79.9% | — | 74.1% | 83.1% |
| Arrived on time | 81.8% | — | 76.8% | 83.8% |
| Cancelled | 0.4% | — | 1.3% | 0.4% |
| Average departure delay (late minutes only) | 11.5 min | — | 17.6 min | 11.6 min |
| Scheduled departures a day | 176 | — | 174 | 19,013 |
| Scheduled departures | 5,270 | — | 63,318 | 570,394 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| WN Southwest Airlines | 3,463 | 66% | 79.6% | 4.0 min | 0.5% |
| AA American Airlines | 512 | 10% | 85.0% | 5.1 min | 0.0% |
| DL Delta Air Lines | 414 | 8% | 92.8% | -7.7 min | 0.0% |
| UA United Airlines | 210 | 4% | 82.4% | 2.4 min | 0.0% |
| YX Republic Airline | 179 | 3% | 92.7% | -8.9 min | 0.0% |
| 9E Endeavor Air | 131 | 2% | 87.0% | -6.6 min | 1.5% |
| MQ Envoy Air | 118 | 2% | 78.8% | -0.4 min | 1.7% |
| F9 Frontier Airlines | 80 | 2% | 78.8% | 12.6 min | 0.0% |
| AS Alaska Airlines | 56 | 1% | 87.5% | -9.6 min | 0.0% |
| OH PSA Airlines | 44 | 1% | 75.0% | 3.8 min | 0.0% |
| OO SkyWest Airlines | 32 | 1% | 84.4% | -5.3 min | 0.0% |
| NK Spirit Airlines | 31 | 1% | 61.3% | 27.1 min | 3.2% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| STL–DEN | St. Louis to Denver | 372 | 89.2% | -5.2 min | 0.3% |
| STL–ATL | St. Louis to Atlanta | 321 | 85.7% | 0.7 min | 0.0% |
| STL–LGA | St. Louis to New York | 308 | 81.8% | 0.5 min | 1.0% |
| STL–MCO | St. Louis to Orlando | 231 | 74.9% | 15.1 min | 0.9% |
| STL–DCA | St. Louis to Washington | 198 | 78.8% | 3.9 min | 0.0% |
| STL–PHX | St. Louis to Phoenix | 187 | 84.5% | -0.9 min | 0.0% |
| STL–DAL | St. Louis to Dallas | 180 | 83.3% | 5.5 min | 0.0% |
| STL–MDW | St. Louis to Chicago | 178 | 80.9% | 5.0 min | 3.4% |
| STL–DFW | St. Louis to Dallas/Fort Worth | 174 | 85.6% | 1.9 min | 0.0% |
| STL–LAS | St. Louis to Las Vegas | 159 | 91.8% | -8.6 min | 0.0% |
| STL–DTW | St. Louis to Detroit | 158 | 88.6% | 1.1 min | 0.0% |
| STL–MSP | St. Louis to Minneapolis | 158 | 91.1% | -5.0 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left STL on time in December 2023?
79.9% of 5,270 scheduled domestic departures left less than 15 minutes late, and 81.8% reached their destination on time. The national figures that month were 83.1% and 83.8%.
How does that compare with a year earlier?
December 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 December 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.