George Bush Intercontinental/Houston in May 2024

60.3%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 May 2024, reporting carriers scheduled 10,125 domestic departures from George Bush Intercontinental/Houston (IAH). 60.3% left less than 15 minutes late and 58.6% reached their destination on time; 3.4% were cancelled.

Nationally that month, 73.4% of flights departed on time and 72.3% arrived on time, so IAH departures were 13.1 points below the national departure figure.

Flights arriving at IAH that month were on time 64.3% of the time (10,125 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, air carrier 28% and national aviation system 16%.

On time 58.6%
Arrived 15+ minutes late 37.6%
Cancelled 3.4%
Diverted 0.4%

Every scheduled departure from IAH in May 2024, judged by arrival at the destination.

May 2024 against a year earlier, the airport's year and the nation

Measure	May 2024	Year earlier	IAH, 12 months to Jul 2026	All reported flights, May 2024
Departed on time	60.3%	—	78.1%	73.4%
Arrived on time	58.6%	—	77.6%	72.3%
Cancelled	3.4%	—	1.1%	1.4%
Average departure delay (late minutes only)	39.7 min	—	17.2 min	20.8 min
Scheduled departures a day	338	—	326	20,325
Scheduled departures	10,125	—	119,020	609,743

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	5,656	56%	57.2%	37.0 min	2.7%
OO SkyWest Airlines	1,255	12%	61.7%	27.4 min	8.2%
NK Spirit Airlines	850	8%	62.4%	26.4 min	1.6%
DL Delta Air Lines	705	7%	68.7%	30.6 min	0.0%
AA American Airlines	654	6%	54.1%	54.9 min	6.1%
WN Southwest Airlines	424	4%	66.7%	25.4 min	0.9%
F9 Frontier Airlines	324	3%	42.0%	49.9 min	5.2%
MQ Envoy Air	99	1%	50.5%	34.1 min	9.1%
AS Alaska Airlines	91	1%	57.1%	32.1 min	1.1%
B6 JetBlue Airways	62	1%	58.1%	47.2 min	1.6%
YX Republic Airline	5	0%	60.0%	32.6 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
IAH–ORD	Houston to Chicago	489	55.8%	39.2 min	1.4%
IAH–DEN	Houston to Denver	468	56.6%	31.7 min	2.6%
IAH–LAX	Houston to Los Angeles	467	67.2%	28.6 min	1.1%
IAH–DFW	Houston to Dallas/Fort Worth	460	43.7%	54.9 min	10.4%
IAH–ATL	Houston to Atlanta	400	57.8%	38.2 min	1.0%
IAH–LAS	Houston to Las Vegas	379	64.6%	33.2 min	1.6%
IAH–LGA	Houston to New York	377	63.1%	24.9 min	2.1%
IAH–EWR	Houston to Newark	319	62.7%	27.2 min	2.5%
IAH–MCO	Houston to Orlando	310	60.0%	32.7 min	2.9%
IAH–MIA	Houston to Miami	300	56.7%	39.0 min	2.7%
IAH–SFO	Houston to San Francisco	258	56.2%	34.4 min	0.8%
IAH–MSY	Houston to New Orleans	257	60.7%	37.9 min	3.9%

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), May 2024.

Delay causes

BTS cause category	Share of delay minutes	National, May 2024	Minutes
Air carrier	27.6%	29.8%	106,655
Late-arriving aircraft	42.1%	43.0%	162,559
National Aviation System	15.6%	20.1%	60,094
Extreme weather	14.6%	7.0%	56,446
Security	0.0%	0.1%	159

385,913 delay minutes on 3,808 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 May 2024?

60.3% of 10,125 scheduled domestic departures left less than 15 minutes late, and 58.6% reached their destination on time. The national figures that month were 73.4% and 72.3%.

How does that compare with a year earlier?

May 2023 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2024; 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.