William P Hobby in September 2023

80.5%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 2023, reporting carriers scheduled 4,504 domestic departures from William P Hobby (HOU). 80.5% left less than 15 minutes late and 80.0% reached their destination on time; 0.4% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.1% arrived on time, so HOU departures were level with the national departure figure.

Flights arriving at HOU that month were on time 81.4% of the time (4,499 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 40%, air carrier 35% and national aviation system 19%.

On time 80.0%
Arrived 15+ minutes late 19.4%
Cancelled 0.4%
Diverted 0.3%

Every scheduled departure from HOU in September 2023, judged by arrival at the destination.

September 2023 against a year earlier, the airport's year and the nation

Measure	Sep 2023	Year earlier	HOU, 12 months to Jul 2026	All reported flights, Sep 2023
Departed on time	80.5%	—	72.7%	80.5%
Arrived on time	80.0%	—	76.0%	80.1%
Cancelled	0.4%	—	0.9%	1.2%
Average departure delay (late minutes only)	12.3 min	—	15.0 min	14.1 min
Scheduled departures a day	150	—	148	18,978
Scheduled departures	4,504	—	53,894	569,338

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	4,127	92%	80.1%	5.3 min	0.4%
MQ Envoy Air	155	3%	78.7%	6.3 min	0.0%
DL Delta Air Lines	137	3%	86.1%	13.9 min	0.0%
OO SkyWest Airlines	49	1%	71.4%	37.3 min	2.0%
G4 Allegiant Air	21	0%	66.7%	16.1 min	0.0%
F9 Frontier Airlines	15	0%	40.0%	102.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
HOU–DAL	Houston to Dallas	337	78.9%	5.9 min	0.9%
HOU–ATL	Houston to Atlanta	298	84.2%	8.1 min	0.3%
HOU–DFW	Houston to Dallas/Fort Worth	204	77.0%	13.6 min	0.5%
HOU–DEN	Houston to Denver	186	75.3%	6.6 min	0.5%
HOU–PHX	Houston to Phoenix	169	76.3%	10.5 min	0.0%
HOU–LAS	Houston to Las Vegas	162	79.0%	9.2 min	1.2%
HOU–MSY	Houston to New Orleans	159	83.0%	0.6 min	0.0%
HOU–MDW	Houston to Chicago	150	81.3%	6.0 min	0.0%
HOU–AUS	Houston to Austin	146	79.5%	8.0 min	0.7%
HOU–MCO	Houston to Orlando	143	74.1%	16.7 min	0.0%
HOU–SAT	Houston to San Antonio	143	82.5%	4.5 min	0.0%
HOU–BNA	Houston to Nashville	124	92.7%	-1.0 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 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2023	Minutes
Air carrier	34.6%	36.4%	16,986
Late-arriving aircraft	40.0%	38.3%	19,613
National Aviation System	18.7%	19.9%	9,188
Extreme weather	6.3%	5.1%	3,103
Security	0.3%	0.2%	152

49,042 delay minutes on 872 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 2023?

80.5% of 4,504 scheduled domestic departures left less than 15 minutes late, and 80.0% reached their destination on time. The national figures that month were 80.5% and 80.1%.

How does that compare with a year earlier?

September 2022 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2023; 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.