St Louis Lambert International in November 2025

76.4%departed on time

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 November 2025, reporting carriers scheduled 5,202 domestic departures from St Louis Lambert International (STL). 76.4% left less than 15 minutes late and 78.9% reached their destination on time; 1.5% were cancelled.

Nationally that month, 78.1% of flights departed on time and 77.3% arrived on time, so STL departures were 1.7 points below the national departure figure.

A year earlier, in November 2024, the airport had 5,263 departures with 86.0% leaving on time: a change of −9.6 points, with flights down 1%.

Flights arriving at STL that month were on time 80.4% of the time (5,203 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 43%, air carrier 26% and national aviation system 25%.

On time 78.9%
Arrived 15+ minutes late 19.6%
Cancelled 1.5%
Diverted 0.1%

Every scheduled departure from STL in November 2025, judged by arrival at the destination.

November 2025 against a year earlier, the airport's year and the nation

Measure	Nov 2025	Nov 2024	STL, 12 months to Jul 2026	All reported flights, Nov 2025
Departed on time	76.4%	86.0%	74.1%	78.1%
Arrived on time	78.9%	86.7%	76.8%	77.3%
Cancelled	1.5%	0.1%	1.3%	2.5%
Average departure delay (late minutes only)	16.9 min	9.3 min	17.6 min	15.6 min
Scheduled departures a day	173	175	174	19,018
Scheduled departures	5,202	5,263	63,318	570,550

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	3,279	63%	79.5%	4.7 min	0.7%
DL Delta Air Lines	449	9%	84.9%	-2.0 min	2.4%
AA American Airlines	419	8%	79.2%	15.8 min	2.4%
YX Republic Airline	340	7%	73.8%	10.5 min	4.4%
UA United Airlines	219	4%	72.6%	16.2 min	0.5%
MQ Envoy Air	126	2%	73.0%	14.1 min	3.2%
F9 Frontier Airlines	121	2%	79.3%	4.2 min	4.1%
OO SkyWest Airlines	111	2%	69.4%	19.1 min	4.5%
OH PSA Airlines	76	1%	72.4%	4.5 min	1.3%
AS Alaska Airlines	50	1%	90.0%	-3.6 min	2.0%
NK Spirit Airlines	12	0%	58.3%	27.7 min	8.3%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
STL–ATL	St. Louis to Atlanta	284	81.0%	-0.6 min	3.2%
STL–DEN	St. Louis to Denver	275	81.8%	3.4 min	0.4%
STL–ORD	St. Louis to Chicago	241	64.7%	26.1 min	4.6%
STL–DFW	St. Louis to Dallas/Fort Worth	210	70.0%	29.0 min	4.8%
STL–DCA	St. Louis to Washington	208	71.2%	8.6 min	2.9%
STL–MCO	St. Louis to Orlando	203	80.8%	2.2 min	1.5%
STL–LGA	St. Louis to New York	189	66.1%	22.8 min	2.1%
STL–PHX	St. Louis to Phoenix	187	70.1%	17.9 min	0.5%
STL–LAS	St. Louis to Las Vegas	173	82.7%	4.9 min	0.0%
STL–CLT	St. Louis to Charlotte	162	80.9%	4.7 min	0.6%
STL–PHL	St. Louis to Philadelphia	162	84.0%	-0.4 min	0.6%
STL–DAL	St. Louis to Dallas	153	77.1%	2.3 min	2.6%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), November 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Nov 2025	Minutes
Air carrier	25.7%	30.2%	19,940
Late-arriving aircraft	43.4%	38.3%	33,685
National Aviation System	24.8%	26.7%	19,240
Extreme weather	6.0%	4.6%	4,634
Security	0.1%	0.1%	85

77,584 delay minutes on 1,018 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left STL on time in November 2025?

76.4% of 5,202 scheduled domestic departures left less than 15 minutes late, and 78.9% reached their destination on time. The national figures that month were 78.1% and 77.3%.

How does that compare with a year earlier?

In November 2024, 86.0% of 5,263 departures left on time and 0.1% were cancelled, against 76.4% and 1.5% in November 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for November 2025; 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.