St. Louis, MO · Airport profile
STL
St. Louis Lambert International Airport
STL right now
Current operating conditions, from live sources only.
Aviation weather is not currently a factor. FAA operational data — ground stops, ground delay programs and closures — is not currently available to FlyerIntel.
FAA operational data is not currently available to FlyerIntel. Why
Minimal operational impact. Conditions are not a notable factor for operations right now.
Forecast issued 23:27Z.
UpdatedSecurity wait data is not currently available for STL. Why
Parking data is not currently available for STL. Why
FlyerIntel shows live values only where a permitted source provides them. Sections without data are left empty rather than estimated.
Airport reliability
Departures from STL, July 2023 – June 2026.
Better than 56% of major US airports covered by FlyerIntel (58 compared)
Calculated from 192,925 flights. How this is calculated
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – June 2026
Best time to fly from STL
On-time arrival rate by scheduled local departure time.
Flights departing 5–9 AM arrived on time 89.5% of the time, against 64.6% for 9 PM–5 AM departures — a gap of 24.8 percentage points.
By departure window
By departure hour
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Buckets with fewer than 120 flights are not scored.
What to expect at STL
How busy the airport is through the day, from scheduled departure volume.
Scheduled departures by hour
The busiest hour is 10 AM, with about 14 departures a day, against roughly 6 at 9 PM. Counterintuitively, that peak is also more punctual than a typical hour here — early banks fly aircraft that have been on the ground overnight rather than ones inheriting the day’s delays.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Taxi-out is the time between leaving the gate and lifting off, averaged across departures and weighted by hour.
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Sunday the least, a gap of 7.0 percentage points.
By month
July is historically the weakest month and November the strongest, a spread of 15.3 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026
Airlines at STL
Departure performance by operating carrier. Regional flights are reported by the carrier that operated them, not by the mainline brand.
| Carrier | Departures | On time | Cancelled | Median delay |
|---|---|---|---|---|
| Southwest Airlines WN | 121,821 | 78.4% | 0.82% | -4 min |
| American Airlines AA | 19,016 | 79.7% | 1.70% | -7 min |
| Delta Air Lines DL | 16,373 | 88.4% | 0.97% | -13 min |
| United Airlines UA | 8,170 | 75.0% | 1.15% | -3 min |
| Republic Airways YX | 7,740 | 84.1% | 3.36% | -12 min |
| Envoy Air MQ | 5,089 | 77.3% | 2.04% | -6 min |
| SkyWest Airlines OO | 3,785 | 72.8% | 1.98% | -3 min |
| Frontier Airlines F9 | 3,585 | 73.2% | 2.34% | -7 min |
| Alaska Airlines AS | 2,397 | 82.0% | 0.96% | -6 min |
| Endeavor Air 9E | 2,158 | 86.6% | 3.61% | -15 min |
| PSA Airlines OH | 1,924 | 78.2% | 4.83% | -9 min |
| Spirit Airlines NK | 867 | 67.7% | 3.11% | -2 min |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Carriers with fewer than 500 departures are not listed.
Routes from STL
Ranked by FlyerIntel Route Reliability Score.
Most reliable
Busiest routes
| Destination | Flights | On time | Score |
|---|---|---|---|
| STL → DEN Denver | 11,538 | 77.2% | 65 |
| STL → ATL Atlanta | 10,709 | 85.3% | 79 |
| STL → LGA New York | 9,725 | 80.9% | 60 |
| STL → ORD Chicago | 8,222 | 75.4% | 51 |
| STL → MCO Orlando | 7,388 | 78.5% | 65 |
| STL → DCA Washington | 6,993 | 76.7% | 57 |
| STL → DFW Dallas–Fort Worth | 6,938 | 74.9% | 45 |
| STL → PHX Phoenix | 6,748 | 78.1% | 69 |
| STL → LAS Las Vegas | 6,232 | 78.3% | 69 |
| STL → DAL Dallas | 6,122 | 78.6% | 68 |
| STL → CLT Charlotte | 5,850 | 80.7% | 65 |
| STL → MSP Minneapolis | 5,817 | 82.3% | 73 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Only routes with at least 750 flights are ranked.
Reliability over time
On-time arrival rate for departures, by month.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026
Data and sources
Historical statistics
Every historical figure on this page is calculated by FlyerIntel from US DOT Bureau of Transportation Statistics on-time performance records covering July 2023 – June 2026, comprising 192,925 departures from STL. A flight counts as delayed when it arrives 15 or more minutes after schedule.
Live conditions
Aviation weather comes from the NOAA Aviation Weather Center. Operational events come from the FAA where available. FlyerIntel shows the age of every live value and does not display data it cannot currently retrieve.
Latest observation for STL: METAR KSTL 292351Z 15009KT 10SM SCT160 BKN250 29/16 A3003 RMK AO2 SLP158 T02890161 10311 20289 56010 (issued ).