William P Hobby in July 2025

66.2%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 July 2025, reporting carriers scheduled 5,093 domestic departures from William P Hobby (HOU). 66.2% left less than 15 minutes late and 69.8% reached their destination on time; 0.8% were cancelled.

Nationally that month, 69.7% of flights departed on time and 69.0% arrived on time, so HOU departures were 3.5 points below the national departure figure.

A year earlier, in July 2024, the airport had 5,229 departures with 56.5% leaving on time: a change of +9.7 points, with flights down 3%.

Flights arriving at HOU that month were on time 70.7% of the time (5,092 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 50%, air carrier 29% and national aviation system 14%.

On time 69.8%
Arrived 15+ minutes late 28.9%
Cancelled 0.8%
Diverted 0.4%

Every scheduled departure from HOU in July 2025, judged by arrival at the destination.

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

Measure	Jul 2025	Jul 2024	HOU, 12 months to Jul 2026	All reported flights, Jul 2025
Departed on time	66.2%	56.5%	72.7%	69.7%
Arrived on time	69.8%	63.1%	76.0%	69.0%
Cancelled	0.8%	4.5%	0.9%	2.5%
Average departure delay (late minutes only)	20.6 min	28.0 min	15.0 min	24.3 min
Scheduled departures a day	170	174	148	21,048
Scheduled departures	5,093	5,229	53,894	631,428

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	4,695	92%	69.5%	13.1 min	0.6%
MQ Envoy Air	154	3%	77.3%	2.8 min	3.9%
DL Delta Air Lines	139	3%	77.0%	9.5 min	0.7%
OO SkyWest Airlines	56	1%	55.4%	35.0 min	7.1%
G4 Allegiant Air	49	1%	71.4%	12.0 min	2.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
HOU–DAL	Houston to Dallas	344	71.8%	9.5 min	1.5%
HOU–ATL	Houston to Atlanta	275	73.1%	10.9 min	0.4%
HOU–DFW	Houston to Dallas/Fort Worth	210	71.4%	11.2 min	4.8%
HOU–DEN	Houston to Denver	203	68.5%	10.8 min	1.0%
HOU–LAS	Houston to Las Vegas	189	82.0%	2.7 min	0.0%
HOU–MDW	Houston to Chicago	187	62.0%	19.2 min	1.6%
HOU–MCO	Houston to Orlando	181	65.7%	18.2 min	0.0%
HOU–MSY	Houston to New Orleans	180	77.8%	6.2 min	0.0%
HOU–PHX	Houston to Phoenix	180	75.6%	9.7 min	0.0%
HOU–BNA	Houston to Nashville	149	67.8%	13.9 min	0.7%
HOU–STL	Houston to St. Louis	144	77.8%	9.9 min	0.0%
HOU–AUS	Houston to Austin	131	61.8%	18.0 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), July 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2025	Minutes
Air carrier	29.4%	31.1%	25,665
Late-arriving aircraft	50.1%	40.8%	43,695
National Aviation System	13.7%	20.7%	11,912
Extreme weather	6.6%	7.3%	5,735
Security	0.3%	0.1%	245

87,252 delay minutes on 1,474 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 July 2025?

66.2% of 5,093 scheduled domestic departures left less than 15 minutes late, and 69.8% reached their destination on time. The national figures that month were 69.7% and 69.0%.

How does that compare with a year earlier?

In July 2024, 56.5% of 5,229 departures left on time and 4.5% were cancelled, against 66.2% and 0.8% in July 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for July 2025; 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.