George Bush Intercontinental/Houston in January 2025

73.3%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 9,250 domestic departures from George Bush Intercontinental/Houston (IAH). 73.3% left less than 15 minutes late and 76.5% reached their destination on time; 5.6% were cancelled.

Nationally that month, 79.3% of flights departed on time and 78.6% arrived on time, so IAH departures were 6.0 points below the national departure figure.

A year earlier, in January 2024, the airport had 8,933 departures with 69.7% leaving on time: a change of +3.6 points, with flights up 4%.

Flights arriving at IAH that month were on time 74.5% of the time (9,257 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 42%, late-arriving aircraft 37% and national aviation system 16%.

On time 76.5%
Arrived 15+ minutes late 17.6%
Cancelled 5.6%
Diverted 0.3%

Every scheduled departure from IAH 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	IAH, 12 months to Jul 2026	All reported flights, Jan 2025
Departed on time	73.3%	69.7%	78.1%	79.3%
Arrived on time	76.5%	69.7%	77.6%	78.6%
Cancelled	5.6%	6.3%	1.1%	3.0%
Average departure delay (late minutes only)	17.9 min	23.1 min	17.2 min	14.0 min
Scheduled departures a day	308	298	326	17,992
Scheduled departures	9,250	8,933	119,020	539,747

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	5,860	63%	78.5%	1.2 min	5.0%
OO SkyWest Airlines	898	10%	71.0%	17.3 min	7.9%
NK Spirit Airlines	731	8%	77.7%	1.2 min	5.1%
DL Delta Air Lines	602	7%	76.6%	9.9 min	5.1%
AA American Airlines	574	6%	76.5%	13.1 min	8.5%
F9 Frontier Airlines	312	3%	57.1%	22.2 min	7.1%
MQ Envoy Air	109	1%	73.4%	12.7 min	8.3%
AS Alaska Airlines	62	1%	69.4%	2.5 min	4.8%
YX Republic Airline	55	1%	76.4%	4.5 min	5.5%
B6 JetBlue Airways	40	0%	70.0%	15.7 min	0.0%
OH PSA Airlines	7	0%	42.9%	284.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
IAH–DFW	Houston to Dallas/Fort Worth	509	71.1%	18.0 min	9.6%
IAH–LAX	Houston to Los Angeles	479	81.2%	1.6 min	4.4%
IAH–ORD	Houston to Chicago	457	80.3%	1.5 min	4.8%
IAH–DEN	Houston to Denver	378	72.5%	9.6 min	4.0%
IAH–LGA	Houston to New York	375	76.3%	0.0 min	5.9%
IAH–EWR	Houston to Newark	342	83.3%	-11.2 min	5.6%
IAH–ATL	Houston to Atlanta	323	73.7%	11.8 min	8.4%
IAH–MIA	Houston to Miami	323	74.9%	8.8 min	4.6%
IAH–LAS	Houston to Las Vegas	312	74.4%	6.3 min	4.2%
IAH–MCO	Houston to Orlando	271	81.2%	5.6 min	4.4%
IAH–MSY	Houston to New Orleans	258	79.1%	1.0 min	9.3%
IAH–FLL	Houston to Fort Lauderdale	239	74.9%	4.1 min	3.8%

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	41.7%	36.2%	54,658
Late-arriving aircraft	37.2%	34.7%	48,747
National Aviation System	16.1%	19.9%	21,034
Extreme weather	5.0%	9.1%	6,558
Security	0.0%	0.2%	26

131,023 delay minutes on 1,626 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 January 2025?

73.3% of 9,250 scheduled domestic departures left less than 15 minutes late, and 76.5% 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, 69.7% of 8,933 departures left on time and 6.3% were cancelled, against 73.3% and 5.6% 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 IAH · methodology · corrections.