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Airport Operational Performance · IAH

Houston On-Time Performance

Historical arrival and departure reliability for Houston, TX (IAH), covering 44 reported months.

Latest data: Jun 2026Source: DOT Air Travel Consumer ReportFlightline Intel Beta
Latest arrival OTP
73.6%
+6.9 points year over year
Latest departure OTP
70.3%
+6.1 points year over year
National arrival rank
#175
of 351 airports · +0.8 pts vs. national avg
12-month average
79.3%
Arrival OTP · departures 77.8%

Historical On-Time Performance

Monthly arrival and departure performance, with trailing 12-month averages.

Seasonal Arrival Pattern

Average arrival OTP by calendar month across the loaded history.

Historical Records

MeasureResult
Best monthOct 2024 · 87.8%
Weakest monthJul 2024 · 59.2%
Longest improvement streak5 month-to-month gains
Longest decline streak3 month-to-month declines
Latest reported operations19,805

Latest 12 Months

Newest month appears first.

MonthArr.Dep.ArrivalsDepartures
Jun 202673.6%70.3%9,9029,903
May 202676.5%75.1%10,10910,105
Apr 202681.3%80.8%10,01310,022
Mar 202676.5%74.3%10,49610,492
Feb 202687.3%84.5%8,9738,976
Jan 202683.2%82.1%9,6549,656
Dec 202578.9%78.3%9,9719,971
Nov 202579.7%78.7%10,02410,022
Oct 202581.5%82.5%10,24910,247
Sep 202586.8%85.8%9,4899,493
Aug 202575.7%74.1%9,8919,889
Jul 202570.9%67.6%10,31410,311
Flightline Intel readout: Houston recorded 73.6 percent on-time arrivals and 70.3 percent on-time departures in Jun 2026. Its trailing 12-month arrival average stands at 79.3 percent. The strongest month in the current record was Oct 2024 at 87.8 percent, while the weakest was Jul 2024 at 59.2 percent.