William P Hobby in December 2025

76.8%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 December 2025, reporting carriers scheduled 4,634 domestic departures from William P Hobby (HOU). 76.8% left less than 15 minutes late and 81.5% reached their destination on time; 0.4% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so HOU departures were 4.8 points above the national departure figure.

A year earlier, in December 2024, the airport had 4,633 departures with 75.8% leaving on time: a change of +1.0 points, with flights up 0%.

Flights arriving at HOU that month were on time 79.1% of the time (4,633 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 50%, air carrier 34% and national aviation system 16%.

On time 81.5%
Arrived 15+ minutes late 17.9%
Cancelled 0.4%
Diverted 0.2%

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

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

Measure	Dec 2025	Dec 2024	HOU, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	76.8%	75.8%	72.7%	72.0%
Arrived on time	81.5%	77.9%	76.0%	71.9%
Cancelled	0.4%	0.5%	0.9%	1.5%
Average departure delay (late minutes only)	12.2 min	16.8 min	15.0 min	21.2 min
Scheduled departures a day	155	154	148	19,410
Scheduled departures	4,634	4,633	53,894	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	4,315	93%	81.5%	2.9 min	0.4%
DL Delta Air Lines	121	3%	84.3%	5.5 min	2.5%
OH PSA Airlines	88	2%	72.7%	16.3 min	0.0%
MQ Envoy Air	58	1%	86.2%	-0.2 min	0.0%
OO SkyWest Airlines	31	1%	93.5%	-16.5 min	0.0%
G4 Allegiant Air	21	0%	71.4%	6.8 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
HOU–DAL	Houston to Dallas	315	88.3%	-3.1 min	0.6%
HOU–ATL	Houston to Atlanta	254	80.7%	6.2 min	1.2%
HOU–DEN	Houston to Denver	234	79.9%	6.6 min	0.4%
HOU–PHX	Houston to Phoenix	197	85.8%	-0.6 min	0.5%
HOU–MSY	Houston to New Orleans	192	84.4%	-2.0 min	0.5%
HOU–MCO	Houston to Orlando	190	81.1%	6.7 min	0.0%
HOU–LAS	Houston to Las Vegas	183	90.2%	-1.0 min	0.0%
HOU–DFW	Houston to Dallas/Fort Worth	177	80.8%	5.1 min	0.0%
HOU–BNA	Houston to Nashville	162	87.7%	-0.3 min	0.0%
HOU–MDW	Houston to Chicago	144	77.1%	6.4 min	0.0%
HOU–STL	Houston to St. Louis	138	86.2%	2.4 min	0.0%
HOU–BWI	Houston to Baltimore	131	77.1%	8.0 min	1.5%

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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	33.5%	33.3%	13,569
Late-arriving aircraft	50.1%	41.1%	20,308
National Aviation System	15.6%	19.1%	6,310
Extreme weather	0.6%	6.4%	248
Security	0.2%	0.2%	91

40,526 delay minutes on 830 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 December 2025?

76.8% of 4,634 scheduled domestic departures left less than 15 minutes late, and 81.5% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 75.8% of 4,633 departures left on time and 0.5% were cancelled, against 76.8% and 0.4% in December 2025.

Provenance

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