William P Hobby in August 2023

80.4%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 August 2023, reporting carriers scheduled 4,717 domestic departures from William P Hobby (HOU). 80.4% left less than 15 minutes late and 83.3% reached their destination on time; 0.9% were cancelled.

Nationally that month, 76.7% of flights departed on time and 76.9% arrived on time, so HOU departures were 3.7 points above the national departure figure.

Flights arriving at HOU that month were on time 80.7% of the time (4,718 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 51%, air carrier 31% and national aviation system 15%.

On time 83.3%
Arrived 15+ minutes late 15.6%
Cancelled 0.9%
Diverted 0.2%

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

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

Measure	Aug 2023	Year earlier	HOU, 12 months to Jul 2026	All reported flights, Aug 2023
Departed on time	80.4%	—	72.7%	76.7%
Arrived on time	83.3%	—	76.0%	76.9%
Cancelled	0.9%	—	0.9%	1.5%
Average departure delay (late minutes only)	9.7 min	—	15.0 min	17.3 min
Scheduled departures a day	157	—	148	20,100
Scheduled departures	4,717	—	53,894	602,987

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	4,331	92%	83.6%	0.9 min	0.8%
MQ Envoy Air	161	3%	89.4%	-3.3 min	0.0%
DL Delta Air Lines	110	2%	71.8%	18.7 min	5.5%
OO SkyWest Airlines	55	1%	83.6%	-4.4 min	0.0%
G4 Allegiant Air	34	1%	67.6%	27.2 min	0.0%
F9 Frontier Airlines	26	1%	65.4%	19.2 min	11.5%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
HOU–DAL	Houston to Dallas	356	88.5%	-3.3 min	0.3%
HOU–ATL	Houston to Atlanta	261	76.6%	9.8 min	3.1%
HOU–DEN	Houston to Denver	231	83.5%	1.2 min	1.3%
HOU–DFW	Houston to Dallas/Fort Worth	216	88.0%	-3.6 min	0.0%
HOU–MSY	Houston to New Orleans	182	87.9%	-1.4 min	0.0%
HOU–LAS	Houston to Las Vegas	167	76.6%	2.5 min	3.0%
HOU–MCO	Houston to Orlando	154	81.2%	3.3 min	1.9%
HOU–MDW	Houston to Chicago	148	77.0%	3.8 min	1.4%
HOU–AUS	Houston to Austin	147	85.0%	2.2 min	0.0%
HOU–BNA	Houston to Nashville	147	89.8%	-2.5 min	0.0%
HOU–SAT	Houston to San Antonio	147	85.0%	1.8 min	0.0%
HOU–PHX	Houston to Phoenix	136	84.6%	1.6 min	0.7%

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), August 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2023	Minutes
Air carrier	30.7%	36.7%	10,471
Late-arriving aircraft	51.1%	42.2%	17,418
National Aviation System	15.0%	15.7%	5,123
Extreme weather	2.7%	5.1%	935
Security	0.4%	0.2%	153

34,100 delay minutes on 736 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 August 2023?

80.4% of 4,717 scheduled domestic departures left less than 15 minutes late, and 83.3% reached their destination on time. The national figures that month were 76.7% and 76.9%.

How does that compare with a year earlier?

August 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 August 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.