IAH · George Bush Intercontinental Airport

Share of flights 15+ min late, by month

departures arrivals usual for the month (departures) Jan 2015 → Jul 2026; gridlines 10/20/30/40%

Month	Flights	Late 15+	vs usual	Cancelled	Avg min	Main cause
Jul 2026	10,244	26.6%	-4.0	1.3%	22	Late aircraft
Jun 2026	9,903	29.2%	-2.1	0.7%	25	Late aircraft
May 2026	10,105	24.5%	-2.4	0.5%	19	Late aircraft
Apr 2026	10,022	18.8%	-0.9	0.6%	14	Late aircraft
Mar 2026	10,492	23.5%	+1.4	2.9%	23	Late aircraft
Feb 2026	8,976	14.6%	-5.2	1.1%	11	Airline
Jan 2026	9,656	15.3%	-7.1	3.1%	12	Airline
Dec 2025	9,971	21.2%	-0.9	0.6%	17	Airline
Nov 2025	10,022	20.4%	+5.4	1.1%	16	Air traffic
Oct 2025	10,247	17.3%	+1.0	0.3%	13	Late aircraft
Sep 2025	9,493	14.1%	-2.6	0.2%	11	Airline
Aug 2025	9,889	25.3%	+2.7	0.9%	20	Late aircraft
Jul 2025	10,311	31.2%	+2.4	1.7%	29	Late aircraft
Jun 2025	10,009	34.2%	+6.8	2.3%	33	Late aircraft
May 2025	10,238	27.6%	+4.5	1.3%	25	Late aircraft
Apr 2025	9,510	19.7%	-1.9	0.5%	17	Late aircraft
Mar 2025	9,849	20.8%	-1.3	0.7%	16	Airline
Feb 2025	8,470	19.9%	+2.0	0.4%	16	Airline
Jan 2025	9,250	22.3%	+2.5	5.6%	18	Airline
Dec 2024	9,572	24.3%	+5.2	1.2%	20	Airline
Nov 2024	9,576	15.6%	+0.6	0.2%	11	Airline
Oct 2024	10,228	14.4%	-1.9	0.5%	11	Airline
Sep 2024	9,502	16.7%	-0.6	0.6%	11	Late aircraft
Aug 2024	10,284	24.9%	+4.3	1.5%	20	Late aircraft

Airline	Flights	Late	Canc.
Alaska	95	22.6%	2.1%
Envoy	97	25.5%	3.1%
Spirit	667	25.6%	1.0%
United	6,292	26.5%	1.0%
American	723	27.5%	2.4%
Delta	687	28.8%	0.4%
SkyWest	1,274	30.4%	2.4%
JetBlue	84	34.1%	2.4%
Frontier	314	41.5%	1.0%

Airlines with 30+ departures that month.

Date	Flights	Late	Canc.
2017-08-28	360	100%	99%
2017-08-29	322	—	100%
2017-08-30	355	100%	99%
2021-02-15	285	—	100%
2021-02-16	258	—	100%
2025-01-21	272	—	100%
2017-08-27	351	67%	97%
2024-07-08	345	76%	95%
2016-04-18	409	93%	74%
2018-01-16	444	62%	81%
2019-09-19	516	49%	82%
2017-08-31	360	27%	87%

Departures; ranked by share late or cancelled.

Started (UTC)	What	Hours
2026-10-16 16:00	Departure delays	0.2