St Louis Lambert International in February 2025

82.3%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 February 2025, reporting carriers scheduled 4,419 domestic departures from St Louis Lambert International (STL). 82.3% left less than 15 minutes late and 81.5% reached their destination on time; 1.0% were cancelled.

Nationally that month, 79.2% of flights departed on time and 77.9% arrived on time, so STL departures were 3.1 points above the national departure figure.

A year earlier, in February 2024, the airport had 4,603 departures with 84.6% leaving on time: a change of −2.3 points, with flights down 4%.

Flights arriving at STL that month were on time 83.3% of the time (4,418 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 41%, national aviation system 31% and air carrier 24%.

On time 81.5%
Arrived 15+ minutes late 17.4%
Cancelled 1.0%
Diverted 0.1%

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

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

Measure	Feb 2025	Feb 2024	STL, 12 months to Jul 2026	All reported flights, Feb 2025
Departed on time	82.3%	84.6%	74.1%	79.2%
Arrived on time	81.5%	83.8%	76.8%	77.9%
Cancelled	1.0%	0.5%	1.3%	1.5%
Average departure delay (late minutes only)	11.7 min	10.1 min	17.6 min	15.3 min
Scheduled departures a day	147	153	174	16,830
Scheduled departures	4,419	4,603	63,318	504,884

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	2,848	64%	81.8%	-0.4 min	0.8%
DL Delta Air Lines	373	8%	84.7%	-0.9 min	0.0%
AA American Airlines	354	8%	82.5%	4.6 min	0.6%
YX Republic Airline	270	6%	83.3%	-3.7 min	1.9%
UA United Airlines	189	4%	76.7%	5.8 min	0.5%
MQ Envoy Air	130	3%	74.6%	8.7 min	0.8%
OH PSA Airlines	81	2%	64.2%	5.7 min	12.3%
F9 Frontier Airlines	69	2%	79.7%	-3.8 min	0.0%
OO SkyWest Airlines	55	1%	85.5%	-1.2 min	1.8%
AS Alaska Airlines	38	1%	81.6%	0.1 min	0.0%
NK Spirit Airlines	12	0%	83.3%	-8.8 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
STL–DEN	St. Louis to Denver	252	80.6%	2.3 min	0.0%
STL–ATL	St. Louis to Atlanta	247	83.8%	-3.2 min	0.0%
STL–LGA	St. Louis to New York	201	83.6%	-4.4 min	1.0%
STL–MCO	St. Louis to Orlando	182	84.6%	-2.3 min	0.0%
STL–PHX	St. Louis to Phoenix	180	84.4%	0.1 min	0.0%
STL–ORD	St. Louis to Chicago	164	80.5%	10.1 min	1.8%
STL–DFW	St. Louis to Dallas/Fort Worth	161	75.2%	3.0 min	0.0%
STL–DAL	St. Louis to Dallas	160	85.0%	-2.1 min	0.6%
STL–DCA	St. Louis to Washington	157	54.1%	23.4 min	5.7%
STL–CLT	St. Louis to Charlotte	152	84.2%	-1.2 min	1.3%
STL–LAS	St. Louis to Las Vegas	152	82.2%	-2.8 min	0.7%
STL–MSP	St. Louis to Minneapolis	145	80.7%	8.3 min	0.0%

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), February 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Feb 2025	Minutes
Air carrier	24.0%	33.9%	11,772
Late-arriving aircraft	41.3%	36.9%	20,225
National Aviation System	31.3%	22.5%	15,361
Extreme weather	3.3%	6.6%	1,613
Security	0.1%	0.1%	34

49,005 delay minutes on 769 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 February 2025?

82.3% of 4,419 scheduled domestic departures left less than 15 minutes late, and 81.5% reached their destination on time. The national figures that month were 79.2% and 77.9%.

How does that compare with a year earlier?

In February 2024, 84.6% of 4,603 departures left on time and 0.5% were cancelled, against 82.3% and 1.0% in February 2025.

Provenance

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