Los Angeles International in September 2025

85.3%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 September 2025, reporting carriers scheduled 15,262 domestic departures from Los Angeles International (LAX). 85.3% left less than 15 minutes late and 85.3% reached their destination on time; 0.3% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so LAX departures were 2.2 points above the national departure figure.

A year earlier, in September 2024, the airport had 15,969 departures with 86.8% leaving on time: a change of −1.5 points, with flights down 4%.

Flights arriving at LAX that month were on time 84.4% of the time (15,264 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 37%, late-arriving aircraft 37% and national aviation system 25%.

On time 85.3%
Arrived 15+ minutes late 14.1%
Cancelled 0.3%
Diverted 0.2%

Every scheduled departure from LAX in September 2025, judged by arrival at the destination.

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

Measure	Sep 2025	Sep 2024	LAX, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	85.3%	86.8%	79.0%	83.1%
Arrived on time	85.3%	86.7%	79.0%	82.8%
Cancelled	0.3%	0.2%	0.9%	0.5%
Average departure delay (late minutes only)	10.6 min	10.1 min	15.1 min	12.2 min
Scheduled departures a day	509	532	521	18,748
Scheduled departures	15,262	15,969	190,106	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	3,355	22%	89.2%	-4.8 min	0.1%
DL Delta Air Lines	3,028	20%	87.4%	-2.5 min	0.1%
AA American Airlines	2,210	14%	80.0%	5.8 min	0.8%
UA United Airlines	2,208	14%	85.7%	-3.7 min	0.2%
WN Southwest Airlines	2,022	13%	82.4%	1.1 min	0.2%
B6 JetBlue Airways	621	4%	83.9%	-5.5 min	0.2%
AS Alaska Airlines	612	4%	92.6%	-9.9 min	0.3%
NK Spirit Airlines	596	4%	86.7%	-3.7 min	0.7%
F9 Frontier Airlines	449	3%	71.5%	15.4 min	0.7%
HA Hawaiian Airlines	146	1%	82.2%	8.1 min	0.0%
G4 Allegiant Air	11	0%	90.9%	-8.6 min	0.0%
MQ Envoy Air	4	0%	100.0%	-14.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
LAX–SFO	Los Angeles to San Francisco	916	70.0%	9.0 min	0.0%
LAX–JFK	Los Angeles to New York	857	83.1%	-1.8 min	0.4%
LAX–LAS	Los Angeles to Las Vegas	690	77.4%	8.1 min	0.6%
LAX–DEN	Los Angeles to Denver	649	80.7%	4.1 min	0.3%
LAX–ORD	Los Angeles to Chicago	614	81.4%	0.6 min	0.2%
LAX–SEA	Los Angeles to Seattle	606	92.1%	-10.6 min	0.5%
LAX–PHX	Los Angeles to Phoenix	586	81.9%	6.7 min	1.4%
LAX–DFW	Los Angeles to Dallas/Fort Worth	487	79.3%	6.4 min	1.4%
LAX–EWR	Los Angeles to Newark	467	83.7%	-4.3 min	0.9%
LAX–SMF	Los Angeles to Sacramento	461	90.0%	-4.8 min	0.2%
LAX–ATL	Los Angeles to Atlanta	455	87.7%	-0.9 min	0.2%
LAX–IAH	Los Angeles to Houston	439	92.3%	-8.0 min	0.0%

By scheduled departure hour

100

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

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

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	37.4%	34.3%	53,336
Late-arriving aircraft	36.6%	37.4%	52,158
National Aviation System	24.5%	22.6%	34,939
Extreme weather	1.4%	5.6%	2,066
Security	0.1%	0.1%	187

142,686 delay minutes on 2,158 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 LAX on time in September 2025?

85.3% of 15,262 scheduled domestic departures left less than 15 minutes late, and 85.3% reached their destination on time. The national figures that month were 83.1% and 82.8%.

How does that compare with a year earlier?

In September 2024, 86.8% of 15,969 departures left on time and 0.2% were cancelled, against 85.3% and 0.3% in September 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for LAX · methodology · corrections.