William P Hobby in April 2025

76.4%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 April 2025, reporting carriers scheduled 4,624 domestic departures from William P Hobby (HOU). 76.4% left less than 15 minutes late and 78.7% reached their destination on time; 0.6% were cancelled.

Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so HOU departures were 4.2 points below the national departure figure.

A year earlier, in April 2024, the airport had 4,857 departures with 76.8% leaving on time: a change of −0.4 points, with flights down 5%.

Flights arriving at HOU that month were on time 79.7% of the time (4,625 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 45%, air carrier 26% and national aviation system 18%.

On time 78.7%
Arrived 15+ minutes late 20.4%
Cancelled 0.6%
Diverted 0.2%

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

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

Measure	Apr 2025	Apr 2024	HOU, 12 months to Jul 2026	All reported flights, Apr 2025
Departed on time	76.4%	76.8%	72.7%	80.6%
Arrived on time	78.7%	80.4%	76.0%	79.5%
Cancelled	0.6%	0.5%	0.9%	0.8%
Average departure delay (late minutes only)	15.1 min	13.9 min	15.0 min	14.1 min
Scheduled departures a day	154	162	148	19,465
Scheduled departures	4,624	4,857	53,894	583,950

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	4,262	92%	79.2%	6.3 min	0.5%
MQ Envoy Air	137	3%	70.8%	13.4 min	2.9%
DL Delta Air Lines	127	3%	81.9%	5.1 min	0.0%
OO SkyWest Airlines	60	1%	65.0%	21.7 min	6.7%
G4 Allegiant Air	26	1%	73.1%	17.5 min	0.0%
F9 Frontier Airlines	12	0%	58.3%	32.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
HOU–DAL	Houston to Dallas	352	76.7%	5.1 min	3.4%
HOU–ATL	Houston to Atlanta	245	78.4%	6.4 min	0.0%
HOU–MSY	Houston to New Orleans	199	82.9%	3.8 min	0.0%
HOU–DFW	Houston to Dallas/Fort Worth	197	69.0%	15.8 min	4.1%
HOU–PHX	Houston to Phoenix	193	80.3%	6.1 min	0.0%
HOU–LAS	Houston to Las Vegas	178	79.8%	8.4 min	0.0%
HOU–DEN	Houston to Denver	175	73.1%	8.8 min	1.7%
HOU–MCO	Houston to Orlando	153	86.9%	3.8 min	0.0%
HOU–BNA	Houston to Nashville	147	77.6%	11.9 min	0.7%
HOU–MDW	Houston to Chicago	142	85.9%	1.0 min	0.0%
HOU–AUS	Houston to Austin	128	84.4%	1.7 min	0.0%
HOU–SAT	Houston to San Antonio	128	80.5%	1.6 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), April 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2025	Minutes
Air carrier	26.1%	32.7%	16,088
Late-arriving aircraft	44.8%	39.4%	27,582
National Aviation System	17.9%	22.2%	11,050
Extreme weather	10.8%	5.5%	6,660
Security	0.3%	0.2%	214

61,594 delay minutes on 944 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 April 2025?

76.4% of 4,624 scheduled domestic departures left less than 15 minutes late, and 78.7% reached their destination on time. The national figures that month were 80.6% and 79.5%.

How does that compare with a year earlier?

In April 2024, 76.8% of 4,857 departures left on time and 0.5% were cancelled, against 76.4% and 0.6% in April 2025.

Provenance

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