Airport month record
STLNOV
St. Louis Lambert International in November 2025
- Departures
- 5,202
- Month
- November 2025
- National, same month
- 79.4%
- Carriers
- 10
Historical statistics for November 2025, not live status or a forecast for this year’s November. For today’s conditions at STL, see live FAA status.
STL in November lands a B, level with the national rate of 79.4%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 5,202 flights, of which Delta Air Lines flew 449 at 87.4% on time.
Delta Air Lines is the most reliable of the three carriers covered here at 87.4% on time across 449 flights.
Key figures
On time
80.1%
Arrivals under 15 minutes late, of 5,121 completed departures
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
1.46%
Nationally in November: 2.49%
Whole year
78.0%
STL across all twelve months
These figures cover 5,202 departures from St. Louis Lambert International in November 2025. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.
Against the year
November next to STL's other months
Against STL's own year, November ran 2 points better than the twelve-month rate of 78.0%, which makes it number five of twelve months, best first. Either side of it, October ran 78.5% on time and December 74.0%, so a trip moved by a few weeks would have landed in a worse stretch.
| Month | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| July 2025 | 5,855 | 71.7% | 73 min | 1.57% | C |
| August 2025 | 5,539 | 79.7% | 71 min | 0.96% | B+ |
| September 2025 | 5,321 | 83.8% | 58 min | 0.34% | B+ |
| October 2025 | 5,611 | 78.5% | 60 min | 0.27% | B+ |
| November 2025 (this page) | 5,202 | 80.1% | 76 min | 1.46% | B |
| December 2025 | 5,359 | 74.0% | 75 min | 0.90% | C+ |
| January 2026 | 4,683 | 83.1% | 74 min | 3.46% | B− |
| February 2026 | 4,484 | 84.9% | 64 min | 1.32% | B |
| March 2026 | 5,400 | 75.3% | 74 min | 2.52% | B |
| April 2026 | 5,156 | 80.8% | 65 min | 0.80% | B+ |
| May 2026 | 5,375 | 77.5% | 74 min | 0.84% | B+ |
| June 2026 | 5,463 | 69.0% | 68 min | 1.17% | C |
Departure window
The best time of day to leave STL in November
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 21 points, against 7 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am907 flights88.1%
- 8am–11am1,221 flights90.0%
- 11am–2pm580 flights79.0%
- 2pm–5pm935 flights74.6%
- 5pm–8pm883 flights73.5%
- 8pm–5am676 flights69.0%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 90.0% of the time, against 69.0% for the overnight window. That is 21 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 1,221 flights scheduled in it.
Across the week, Wednesday is the strongest day at 87.8% on time and Saturday the weakest at 71.1%. 17 points is a smaller lever than departure hour, but it is free.
Carrier by carrier
Which airlines ran best at STL in November
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 87.4% of the time; Southwest Airlines manages 80.1%. Sample sizes sit next to every figure, because a two-point gap across 3,279 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 3,279 | 80.1% | 62 min | 0.67% | B+ |
| Delta Air Lines | 449 | 87.4% | 96 min | 2.45% | A |
| American Airlines | 419 | 81.2% | 146 min | 2.39% | B |
| Republic Airwaysthin sample | 340 | 77.5% | 90 min | 4.41% | B− |
| United Airlinesthin sample | 219 | 72.9% | 94 min | 0.46% | C+ |
| Envoy Airthin sample | 126 | 75.4% | 85 min | 3.17% | B− |
| Frontier Airlinesthin sample | 121 | 82.8% | 94 min | 4.13% | B− |
| SkyWest Airlinesthin sample | 111 | 72.6% | 99 min | 4.50% | C− |
| PSA Airlinesthin sample | 76 | 74.3% | 69 min | 1.32% | C |
| Alaska Airlinesthin sample | 50 | 91.8% | 51 min | 2.00% | A |
Delta leads Southwest by 7 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Route by route
Busiest routes out of STL in November
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| STL to ATL · Atlantathin sample | 284 | 84.2% | 77 min | 3.17% | B− |
| STL to DEN · Denverthin sample | 275 | 82.1% | 61 min | 0.36% | B+ |
| STL to ORD · Chicagothin sample | 241 | 68.1% | 102 min | 4.56% | C− |
| STL to DFW · Dallas-Fort Worththin sample | 210 | 73.5% | 142 min | 4.76% | C− |
| STL to DCA · Washingtonthin sample | 208 | 73.6% | 73 min | 2.88% | C |
| STL to MCO · Orlandothin sample | 203 | 82.0% | 66 min | 1.48% | B |
| STL to LGA · New Yorkthin sample | 189 | 67.6% | 87 min | 2.12% | C |
| STL to PHX · Phoenixthin sample | 187 | 70.4% | 88 min | 0.53% | C+ |
| STL to LAS · Las Vegasthin sample | 173 | 82.7% | 82 min | 0.00% | B+ |
| STL to CLT · Charlottethin sample | 162 | 81.4% | 88 min | 0.62% | B+ |
| STL to PHL · Philadelphiathin sample | 162 | 84.5% | 51 min | 0.62% | B+ |
| STL to DTW · Detroitthin sample | 153 | 86.8% | 65 min | 1.31% | A |
| STL to DAL · Dallasthin sample | 153 | 79.2% | 47 min | 2.61% | B |
| STL to BOS · Bostonthin sample | 140 | 76.1% | 75 min | 1.43% | B |
| STL to MSP · Minneapolisthin sample | 134 | 82.8% | 105 min | 0.00% | B+ |
| STL to HOU · Houstonthin sample | 133 | 75.9% | 62 min | 0.00% | B+ |
| STL to MDW · Chicagothin sample | 127 | 90.2% | 38 min | 3.94% | A− |
| STL to BWI · Baltimorethin sample | 107 | 82.2% | 72 min | 0.00% | B+ |
| STL to MIA · Miamithin sample | 105 | 81.9% | 50 min | 0.00% | B+ |
| STL to BNA · Nashvillethin sample | 102 | 86.3% | 59 min | 0.00% | A+ |
| STL to LAX · Los Angelesthin sample | 101 | 81.2% | 82 min | 0.00% | B+ |
| STL to TPA · Tampathin sample | 97 | 79.2% | 73 min | 1.03% | B |
| STL to AUS · Austinthin sample | 85 | 77.6% | 54 min | 0.00% | B+ |
| STL to EWR · Newarkthin sample | 85 | 74.7% | 82 min | 7.06% | C− |
| STL to RSW · Fort Myersthin sample | 83 | 86.6% | 55 min | 1.20% | A |
Delay causes
What held STL up in November
One category carries most of the weight here. Late-arriving aircraft accounts for 43% of the 78,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 43%Late-arriving aircraft
- 26%Carrier
- 25%National Airspace System
- 6%Extreme weather
- 0%Security
43% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 78,000 reported delay minutes here, that single category outweighs weather by 7 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 77,584 reported delay minutes.
Cancellations sit at 1.46% against a national 2.49%, which is ordinary. Diversions add another 0.10%.
8.2% of arrivals land an hour or more late, close to the national 7.8%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
What to do with this
Flying from STL in November
For a November trip through STL: expect 80.1% on time and 1.46% cancelled, going by November 2025. The 8am–11am window was the strongest part of the day.
Related
Where to go next
- St. Louis Lambert International (STL), the whole year
- STL in July71.7%
- STL in August79.7%
- STL in September83.8%
- STL in October78.5%
- STL in December74.0%
- STL in January83.1%
- STL in February84.9%
- STL in March75.3%
- STL in April80.8%
- STL in May77.5%
- STL in June69.0%
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.