William P Hobby in March 2025

79.7%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 March 2025, reporting carriers scheduled 4,694 domestic departures from William P Hobby (HOU). 79.7% left less than 15 minutes late and 81.6% reached their destination on time; 0.8% were cancelled.

Nationally that month, 79.9% of flights departed on time and 79.3% arrived on time, so HOU departures were level with the national departure figure.

A year earlier, in March 2024, the airport had 4,935 departures with 77.1% leaving on time: a change of +2.6 points, with flights down 5%.

Flights arriving at HOU that month were on time 82.6% of the time (4,693 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 34% and national aviation system 21%.

On time 81.6%
Arrived 15+ minutes late 17.4%
Cancelled 0.8%
Diverted 0.2%

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

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

Measure	Mar 2025	Mar 2024	HOU, 12 months to Jul 2026	All reported flights, Mar 2025
Departed on time	79.7%	77.1%	72.7%	79.9%
Arrived on time	81.6%	80.4%	76.0%	79.3%
Cancelled	0.8%	1.0%	0.9%	1.2%
Average departure delay (late minutes only)	11.6 min	12.8 min	15.0 min	14.9 min
Scheduled departures a day	157	165	148	20,029
Scheduled departures	4,694	4,935	53,894	600,872

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	4,345	93%	81.8%	3.0 min	0.7%
MQ Envoy Air	125	3%	72.0%	6.8 min	3.2%
DL Delta Air Lines	119	3%	89.1%	-0.6 min	0.0%
OO SkyWest Airlines	59	1%	69.5%	29.2 min	3.4%
G4 Allegiant Air	28	1%	78.6%	27.9 min	0.0%
F9 Frontier Airlines	18	0%	94.4%	-5.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
HOU–DAL	Houston to Dallas	361	80.9%	2.2 min	1.4%
HOU–ATL	Houston to Atlanta	248	87.5%	1.0 min	0.0%
HOU–MSY	Houston to New Orleans	200	88.5%	-0.8 min	0.5%
HOU–PHX	Houston to Phoenix	196	83.7%	3.4 min	0.5%
HOU–DEN	Houston to Denver	184	85.3%	0.9 min	0.0%
HOU–DFW	Houston to Dallas/Fort Worth	184	71.2%	14.1 min	3.3%
HOU–LAS	Houston to Las Vegas	172	84.3%	1.4 min	0.0%
HOU–MCO	Houston to Orlando	166	78.9%	4.5 min	2.4%
HOU–BNA	Houston to Nashville	153	79.1%	4.3 min	0.0%
HOU–MDW	Houston to Chicago	150	88.0%	-1.2 min	0.0%
HOU–STL	Houston to St. Louis	135	84.4%	-1.6 min	0.0%
HOU–SAT	Houston to San Antonio	133	79.7%	2.2 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), March 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Mar 2025	Minutes
Air carrier	33.7%	33.0%	15,237
Late-arriving aircraft	44.3%	39.2%	19,996
National Aviation System	20.8%	21.9%	9,412
Extreme weather	0.6%	5.9%	276
Security	0.6%	0.1%	255

45,176 delay minutes on 817 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 March 2025?

79.7% of 4,694 scheduled domestic departures left less than 15 minutes late, and 81.6% reached their destination on time. The national figures that month were 79.9% and 79.3%.

How does that compare with a year earlier?

In March 2024, 77.1% of 4,935 departures left on time and 1.0% were cancelled, against 79.7% and 0.8% in March 2025.

Provenance

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