William P Hobby in September 2024

85.4%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 September 2024, reporting carriers scheduled 4,407 domestic departures from William P Hobby (HOU). 85.4% left less than 15 minutes late and 89.0% reached their destination on time; 0.4% were cancelled.

Nationally that month, 84.4% of flights departed on time and 83.9% arrived on time, so HOU departures were 1.0 points above the national departure figure.

A year earlier, in September 2023, the airport had 4,504 departures with 80.5% leaving on time: a change of +4.9 points, with flights down 2%.

Flights arriving at HOU that month were on time 85.7% of the time (4,409 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 40%, air carrier 40% and national aviation system 19%.

On time 89.0%
Arrived 15+ minutes late 10.4%
Cancelled 0.4%
Diverted 0.1%

Every scheduled departure from HOU 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	HOU, 12 months to Jul 2026	All reported flights, Sep 2024
Departed on time	85.4%	80.5%	72.7%	84.4%
Arrived on time	89.0%	80.0%	76.0%	83.9%
Cancelled	0.4%	0.4%	0.9%	0.6%
Average departure delay (late minutes only)	6.6 min	12.3 min	15.0 min	10.6 min
Scheduled departures a day	147	150	148	19,421
Scheduled departures	4,407	4,504	53,894	582,622

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	4,048	92%	89.3%	-6.6 min	0.4%
DL Delta Air Lines	140	3%	92.9%	-9.0 min	0.0%
MQ Envoy Air	122	3%	79.5%	-4.7 min	0.0%
OO SkyWest Airlines	67	2%	82.1%	4.7 min	0.0%
F9 Frontier Airlines	21	0%	76.2%	9.9 min	4.8%
G4 Allegiant Air	9	0%	88.9%	-5.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
HOU–DAL	Houston to Dallas	340	84.1%	-3.9 min	0.0%
HOU–ATL	Houston to Atlanta	260	91.2%	-7.1 min	0.4%
HOU–DEN	Houston to Denver	207	89.9%	-6.9 min	0.0%
HOU–DFW	Houston to Dallas/Fort Worth	189	80.4%	-1.4 min	0.0%
HOU–MSY	Houston to New Orleans	177	85.3%	-8.8 min	4.5%
HOU–MDW	Houston to Chicago	160	95.0%	-9.9 min	0.0%
HOU–LAS	Houston to Las Vegas	155	87.7%	-3.2 min	0.0%
HOU–PHX	Houston to Phoenix	154	94.2%	-5.8 min	0.0%
HOU–BNA	Houston to Nashville	134	91.8%	-7.2 min	0.0%
HOU–MCO	Houston to Orlando	134	87.3%	-5.5 min	0.7%
HOU–BWI	Houston to Baltimore	125	88.8%	-6.0 min	0.0%
HOU–STL	Houston to St. Louis	125	89.6%	-8.7 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), September 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2024	Minutes
Air carrier	39.5%	38.6%	6,945
Late-arriving aircraft	39.9%	38.4%	7,015
National Aviation System	18.8%	18.2%	3,313
Extreme weather	1.6%	4.8%	274
Security	0.3%	0.1%	44

17,591 delay minutes on 460 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 HOU on time in September 2024?

85.4% of 4,407 scheduled domestic departures left less than 15 minutes late, and 89.0% 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, 80.5% of 4,504 departures left on time and 0.4% were cancelled, against 85.4% and 0.4% 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 HOU · methodology · corrections.