Airports › St. Louis (STL) › June 2026
Airport month · June 2026
St Louis Lambert International in June 2026
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 June 2026, reporting carriers scheduled 5,463 domestic departures from St Louis Lambert International (STL). 65.9% left less than 15 minutes late and 67.9% reached their destination on time; 1.2% were cancelled.
Nationally that month, 72.2% of flights departed on time and 72.8% arrived on time, so STL departures were 6.3 points below the national departure figure.
A year earlier, in June 2025, the airport had 5,733 departures with 71.6% leaving on time: a change of −5.7 points, with flights down 5%.
Flights arriving at STL that month were on time 71.8% of the time (5,460 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 48%, air carrier 26% and national aviation system 18%.
- On time 67.9%
- Arrived 15+ minutes late 30.5%
- Cancelled 1.2%
- Diverted 0.5%
June 2026 against a year earlier, the airport's year and the nation
| Measure | Jun 2026 | Jun 2025 | STL, 12 months to Jul 2026 | All reported flights, Jun 2026 |
|---|---|---|---|---|
| Departed on time | 65.9% | 71.6% | 74.1% | 72.2% |
| Arrived on time | 67.9% | 71.8% | 76.8% | 72.8% |
| Cancelled | 1.2% | 1.0% | 1.3% | 1.6% |
| Average departure delay (late minutes only) | 23.3 min | 21.1 min | 17.6 min | 20.6 min |
| Scheduled departures a day | 182 | 191 | 174 | 20,253 |
| Scheduled departures | 5,463 | 5,733 | 63,318 | 607,577 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| WN Southwest Airlines | 3,319 | 61% | 63.7% | 16.7 min | 0.2% |
| AA American Airlines | 526 | 10% | 72.8% | 14.6 min | 3.4% |
| DL Delta Air Lines | 478 | 9% | 83.7% | 3.7 min | 1.7% |
| UA United Airlines | 270 | 5% | 71.5% | 20.0 min | 1.5% |
| YX Republic Airline | 208 | 4% | 70.7% | 11.3 min | 3.8% |
| OO SkyWest Airlines | 155 | 3% | 72.9% | 26.2 min | 1.3% |
| F9 Frontier Airlines | 147 | 3% | 61.2% | 22.5 min | 4.1% |
| AS Alaska Airlines | 120 | 2% | 83.3% | 0.5 min | 0.0% |
| MQ Envoy Air | 120 | 2% | 75.0% | 11.1 min | 2.5% |
| OH PSA Airlines | 120 | 2% | 63.3% | 32.9 min | 5.8% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| STL–DEN | St. Louis to Denver | 358 | 65.6% | 19.1 min | 0.8% |
| STL–ATL | St. Louis to Atlanta | 318 | 80.8% | 2.7 min | 1.3% |
| STL–ORD | St. Louis to Chicago | 304 | 67.1% | 26.5 min | 4.3% |
| STL–DFW | St. Louis to Dallas/Fort Worth | 240 | 61.3% | 31.3 min | 5.4% |
| STL–LGA | St. Louis to New York | 204 | 71.1% | 5.4 min | 2.0% |
| STL–MCO | St. Louis to Orlando | 204 | 73.5% | 7.4 min | 1.0% |
| STL–DCA | St. Louis to Washington | 198 | 61.6% | 18.5 min | 3.0% |
| STL–LAS | St. Louis to Las Vegas | 180 | 53.9% | 32.1 min | 1.7% |
| STL–DTW | St. Louis to Detroit | 173 | 69.4% | 17.8 min | 2.3% |
| STL–DAL | St. Louis to Dallas | 170 | 54.7% | 26.9 min | 0.0% |
| STL–CLT | St. Louis to Charlotte | 169 | 75.1% | 9.7 min | 0.6% |
| STL–PHX | St. Louis to Phoenix | 166 | 57.2% | 29.8 min | 0.6% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left STL on time in June 2026?
65.9% of 5,463 scheduled domestic departures left less than 15 minutes late, and 67.9% reached their destination on time. The national figures that month were 72.2% and 72.8%.
How does that compare with a year earlier?
In June 2025, 71.6% of 5,733 departures left on time and 1.0% were cancelled, against 65.9% and 1.2% in June 2026.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for June 2026; 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.