William P Hobby in January 2025

77.9%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 January 2025, reporting carriers scheduled 4,122 domestic departures from William P Hobby (HOU). 77.9% left less than 15 minutes late and 81.2% reached their destination on time; 6.3% were cancelled.

Nationally that month, 79.3% of flights departed on time and 78.6% arrived on time, so HOU departures were 1.4 points below the national departure figure.

A year earlier, in January 2024, the airport had 4,605 departures with 72.8% leaving on time: a change of +5.1 points, with flights down 10%.

Flights arriving at HOU that month were on time 78.5% of the time (4,118 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 49%, air carrier 34% and national aviation system 13%.

On time 81.2%
Arrived 15+ minutes late 12.4%
Cancelled 6.3%
Diverted 0.1%

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

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

Measure	Jan 2025	Jan 2024	HOU, 12 months to Jul 2026	All reported flights, Jan 2025
Departed on time	77.9%	72.8%	72.7%	79.3%
Arrived on time	81.2%	74.3%	76.0%	78.6%
Cancelled	6.3%	2.1%	0.9%	3.0%
Average departure delay (late minutes only)	9.7 min	16.0 min	15.0 min	14.0 min
Scheduled departures a day	137	154	148	17,992
Scheduled departures	4,122	4,605	53,894	539,747

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	3,803	92%	81.6%	-2.6 min	6.1%
MQ Envoy Air	119	3%	78.2%	4.5 min	10.1%
DL Delta Air Lines	103	2%	76.7%	3.9 min	8.7%
OO SkyWest Airlines	38	1%	76.3%	7.8 min	7.9%
OH PSA Airlines	25	1%	72.0%	3.7 min	8.0%
F9 Frontier Airlines	22	1%	77.3%	7.0 min	4.5%
G4 Allegiant Air	12	0%	58.3%	49.4 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
HOU–DAL	Houston to Dallas	348	81.3%	-5.1 min	8.6%
HOU–ATL	Houston to Atlanta	229	79.5%	-0.4 min	8.7%
HOU–DEN	Houston to Denver	216	80.6%	-2.1 min	4.6%
HOU–MSY	Houston to New Orleans	186	81.7%	-3.7 min	9.1%
HOU–DFW	Houston to Dallas/Fort Worth	182	76.9%	5.1 min	9.3%
HOU–PHX	Houston to Phoenix	166	79.5%	2.9 min	4.2%
HOU–LAS	Houston to Las Vegas	164	76.2%	0.5 min	4.9%
HOU–MCO	Houston to Orlando	143	85.3%	-7.4 min	4.2%
HOU–BNA	Houston to Nashville	140	84.3%	-4.6 min	7.9%
HOU–MDW	Houston to Chicago	128	82.8%	-0.8 min	4.7%
HOU–SAT	Houston to San Antonio	127	81.9%	-3.5 min	6.3%
HOU–LGA	Houston to New York	118	85.6%	-12.2 min	5.1%

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), January 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jan 2025	Minutes
Air carrier	33.6%	36.2%	9,335
Late-arriving aircraft	48.8%	34.7%	13,565
National Aviation System	12.8%	19.9%	3,546
Extreme weather	4.8%	9.1%	1,333
Security	0.1%	0.2%	22

27,801 delay minutes on 511 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 January 2025?

77.9% of 4,122 scheduled domestic departures left less than 15 minutes late, and 81.2% reached their destination on time. The national figures that month were 79.3% and 78.6%.

How does that compare with a year earlier?

In January 2024, 72.8% of 4,605 departures left on time and 2.1% were cancelled, against 77.9% and 6.3% in January 2025.

Provenance

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