George Bush Intercontinental/Houston in October 2025

82.5%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 October 2025, reporting carriers scheduled 10,247 domestic departures from George Bush Intercontinental/Houston (IAH). 82.5% left less than 15 minutes late and 80.3% reached their destination on time; 0.3% were cancelled.

Nationally that month, 80.0% of flights departed on time and 79.1% arrived on time, so IAH departures were 2.5 points above the national departure figure.

A year earlier, in October 2024, the airport had 10,228 departures with 85.2% leaving on time: a change of −2.7 points, with flights up 0%.

Flights arriving at IAH that month were on time 81.5% of the time (10,249 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 34%, air carrier 34% and national aviation system 29%.

On time 80.3%
Arrived 15+ minutes late 19.2%
Cancelled 0.3%
Diverted 0.2%

Every scheduled departure from IAH in October 2025, judged by arrival at the destination.

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

Measure	Oct 2025	Oct 2024	IAH, 12 months to Jul 2026	All reported flights, Oct 2025
Departed on time	82.5%	85.2%	78.1%	80.0%
Arrived on time	80.3%	85.8%	77.6%	79.1%
Cancelled	0.3%	0.5%	1.1%	0.5%
Average departure delay (late minutes only)	13.1 min	10.5 min	17.2 min	13.9 min
Scheduled departures a day	342	341	326	20,195
Scheduled departures	10,247	10,228	119,020	605,844

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	6,416	63%	80.6%	4.2 min	0.1%
OO SkyWest Airlines	1,087	11%	83.2%	5.6 min	0.0%
DL Delta Air Lines	746	7%	80.2%	9.2 min	0.9%
AA American Airlines	635	6%	79.4%	14.3 min	0.8%
NK Spirit Airlines	594	6%	81.6%	2.7 min	0.5%
F9 Frontier Airlines	355	3%	72.4%	18.7 min	0.8%
MQ Envoy Air	111	1%	83.8%	3.9 min	1.8%
YX Republic Airline	104	1%	74.0%	2.5 min	0.0%
AS Alaska Airlines	96	1%	76.0%	15.0 min	2.1%
OH PSA Airlines	66	1%	69.7%	13.5 min	0.0%
B6 JetBlue Airways	37	0%	43.2%	46.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
IAH–ORD	Houston to Chicago	517	78.7%	14.9 min	0.6%
IAH–DFW	Houston to Dallas/Fort Worth	503	79.3%	5.8 min	1.4%
IAH–LAX	Houston to Los Angeles	493	84.4%	0.9 min	0.0%
IAH–ATL	Houston to Atlanta	438	80.1%	6.6 min	0.2%
IAH–DEN	Houston to Denver	396	82.8%	2.1 min	0.3%
IAH–LGA	Houston to New York	376	66.8%	22.7 min	1.9%
IAH–EWR	Houston to Newark	336	68.8%	13.5 min	0.6%
IAH–MCO	Houston to Orlando	308	85.7%	1.7 min	0.6%
IAH–SFO	Houston to San Francisco	306	81.7%	1.4 min	0.7%
IAH–MIA	Houston to Miami	304	83.6%	7.0 min	0.3%
IAH–LAS	Houston to Las Vegas	292	82.9%	3.8 min	0.0%
IAH–DCA	Houston to Washington	291	77.7%	4.5 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), October 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Oct 2025	Minutes
Air carrier	34.2%	34.0%	43,780
Late-arriving aircraft	34.4%	39.7%	43,968
National Aviation System	29.3%	22.9%	37,506
Extreme weather	2.0%	3.3%	2,529
Security	0.0%	0.1%	55

127,838 delay minutes on 1,970 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 IAH on time in October 2025?

82.5% of 10,247 scheduled domestic departures left less than 15 minutes late, and 80.3% reached their destination on time. The national figures that month were 80.0% and 79.1%.

How does that compare with a year earlier?

In October 2024, 85.2% of 10,228 departures left on time and 0.5% were cancelled, against 82.5% and 0.3% in October 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for October 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for IAH · methodology · corrections.