Los Angeles International in September 2024

86.8%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 2024, reporting carriers scheduled 15,969 domestic departures from Los Angeles International (LAX). 86.8% left less than 15 minutes late and 86.7% reached their destination on time; 0.2% were cancelled.

Nationally that month, 84.4% of flights departed on time and 83.9% arrived on time, so LAX departures were 2.4 points above the national departure figure.

A year earlier, in September 2023, the airport had 16,152 departures with 82.7% leaving on time: a change of +4.1 points, with flights down 1%.

Flights arriving at LAX that month were on time 85.7% of the time (15,965 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 41%, air carrier 38% and national aviation system 17%.

On time 86.7%
Arrived 15+ minutes late 13.0%
Cancelled 0.2%
Diverted 0.2%

Every scheduled departure from LAX in September 2024, judged by arrival at the destination.

September 2024 against a year earlier, the airport's year and the nation

Measure	Sep 2024	Sep 2023	LAX, 12 months to Jul 2026	All reported flights, Sep 2024
Departed on time	86.8%	82.7%	79.0%	84.4%
Arrived on time	86.7%	83.8%	79.0%	83.9%
Cancelled	0.2%	0.5%	0.9%	0.6%
Average departure delay (late minutes only)	10.1 min	12.2 min	15.1 min	10.6 min
Scheduled departures a day	532	538	521	19,421
Scheduled departures	15,969	16,152	190,106	582,622

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
DL Delta Air Lines	3,065	19%	88.6%	-4.7 min	0.2%
OO SkyWest Airlines	2,961	19%	86.7%	0.4 min	0.0%
AA American Airlines	2,537	16%	85.6%	3.8 min	0.2%
UA United Airlines	2,300	14%	90.6%	-7.5 min	0.4%
WN Southwest Airlines	2,131	13%	84.7%	-2.2 min	0.0%
NK Spirit Airlines	938	6%	89.1%	-4.9 min	0.4%
AS Alaska Airlines	749	5%	85.6%	-1.7 min	0.7%
B6 JetBlue Airways	684	4%	89.6%	-8.5 min	0.0%
F9 Frontier Airlines	360	2%	56.9%	32.9 min	0.8%
HA Hawaiian Airlines	182	1%	80.8%	10.2 min	0.0%
G4 Allegiant Air	62	0%	90.3%	10.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
LAX–SFO	Los Angeles to San Francisco	1,016	76.7%	6.8 min	0.1%
LAX–JFK	Los Angeles to New York	855	90.5%	-4.3 min	0.1%
LAX–LAS	Los Angeles to Las Vegas	789	75.5%	11.9 min	0.0%
LAX–DEN	Los Angeles to Denver	668	89.4%	-2.9 min	0.0%
LAX–SEA	Los Angeles to Seattle	648	86.1%	-2.1 min	0.3%
LAX–PHX	Los Angeles to Phoenix	642	88.8%	-0.4 min	0.0%
LAX–DFW	Los Angeles to Dallas/Fort Worth	549	84.5%	0.7 min	0.0%
LAX–ORD	Los Angeles to Chicago	549	85.6%	3.0 min	0.4%
LAX–SJC	Los Angeles to San Jose	524	88.5%	-3.1 min	0.2%
LAX–EWR	Los Angeles to Newark	505	88.7%	-8.2 min	1.2%
LAX–IAH	Los Angeles to Houston	462	93.7%	-10.8 min	0.0%
LAX–SMF	Los Angeles to Sacramento	457	89.7%	-5.1 min	0.2%

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), September 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2024	Minutes
Air carrier	38.2%	38.6%	54,249
Late-arriving aircraft	41.3%	38.4%	58,767
National Aviation System	16.7%	18.2%	23,771
Extreme weather	3.6%	4.8%	5,142
Security	0.1%	0.1%	194

142,123 delay minutes on 2,068 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 2024?

86.8% of 15,969 scheduled domestic departures left less than 15 minutes late, and 86.7% reached their destination on time. The national figures that month were 84.4% and 83.9%.

How does that compare with a year earlier?

In September 2023, 82.7% of 16,152 departures left on time and 0.5% were cancelled, against 86.8% and 0.2% in September 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2024; 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.